UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    Form 10-Q
                  Quarterly Report Pursuant Section 13 or 15(d)
                     of the Securities Exchange Act of 1934

For Quarterly Period Ended March 31, 2006         Commission file number 0-10661
-----------------------------------------         ------------------------------

                                TRICO BANCSHARES
             (Exact name of registrant as specified in its charter)

           California                                          94-2792841
------------------------------                            -------------------
 (State or other jurisdiction                              (I.R.S. Employer
 incorporation or organization)                           Identification No.)

                 63 Constitution Drive, Chico, California 95973
               (Address of principal executive offices) (Zip code)

Registrant's telephone number, including area code:  (530) 898-0300


--------------------------------------------------------------------------------
(Former  name,  former  address and former  fiscal year,  if changed  since last
report)

     Indicate  by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.

                             Yes  X        No
                                -----        -----

     Indicate by check mark whether the Registrant is a large accelerated filer,
an accelerated filer, or a non-accelerated filer. See definition of "accelerated
filer" and "large accelerated filer" in Rule 12b-2 of the Act (check one).

Large accelerated filer      Accelerated filer  X   Non-accelerated filer
                       -----                  -----                      -----

     Indicate  by check mark  whether  the  registrant  is a shell  company  (as
defined in Rule 12b-2 of the Exchange Act).

                             Yes           No  X
                                -----        -----

                      APPLICABLE ONLY TO CORPORATE ISSUERS:

     Indicate the number of shares  outstanding of each of the issuer's  classes
of common stock, as of the latest practicable date:

Title of Class:  Common stock, no par value

Outstanding shares as of May 2, 2006:  15,778,190





                                TABLE OF CONTENTS

                                                                           Page

Forward-Looking Statements                                                   1

PART I - FINANCIAL INFORMATION                                               2

  Item 1 - Financial Statements                                              2

  Notes to Unaudited Condensed Consolidated Financial Statements             6

  Financial Summary                                                         18

  Item 2 - Management's Discussion and Analysis of Financial                19
                 Condition and Results of Operations

  Item 3 - Quantitative and Qualitative Disclosures about Market Risk       28

  Item 4 - Controls and Procedures                                          29

PART II - OTHER INFORMATION                                                 30

  Item 1 - Legal Proceedings                                                30

  Item 1A - Risk Factors                                                    30

  Item 2 - Unregistered Sales of Equity Securities and Use of Proceeds      30

  Item 6 - Exhibits                                                         30

  Signatures                                                                33

  Exhibits                                                                  34





                           FORWARD-LOOKING STATEMENTS

This  report  on Form  10-Q  contains  forward-looking  statements  about  TriCo
Bancshares (the "Company") for which it claims the protection of the safe harbor
provisions  contained in the Private  Securities  Litigation Reform Act of 1995.
These forward-looking statements are based on Management's current knowledge and
belief and include  information  concerning  the  Company's  possible or assumed
future  financial  condition and results of operations.  When you see any of the
words "believes", "expects", "anticipates", "estimates", or similar expressions,
mean making forward-looking  statements.  A number of factors, some of which are
beyond the Company's  ability to predict or control,  could cause future results
to differ  materially  from those  contemplated.  The reader is  directed to the
Company's  annual report on Form 10-K for the year ended  December 31, 2005, and
Part II, Item 1A of this report for further  discussion  of factors  which could
affect the Company's business and cause actual results to differ materially from
those expressed in any forward-looking statement made in this report.







                                      -1-





                         PART I - FINANCIAL INFORMATION

Item 1.  Financial Statements
                                TRICO BANCSHARES
                           CONSOLIDATED BALANCE SHEETS
                  (In thousands, except share data; unaudited)

                                                                 At March 31,            At December 31,
                                                            2006              2005            2005
                                                      -------------------------------   -----------------
                                                                                      
Assets:
     Cash and due from banks                              $78,742           $77,365           $90,562
     Federal funds sold                                         -               181             2,377
                                                      -------------------------------   -----------------
         Cash and cash equivalents                         78,742            77,546            92,939

     Securities available-for-sale                        244,441           293,730           260,278
     Federal Home Loan Bank stock, at cost                  7,691             6,781             7,602
     Loans, net of allowance for loan losses
         of $16,644, $14,563 and $16,226                1,383,464         1,167,870         1,368,809
     Foreclosed assets, net of allowance for
         losses of $180, $180 and $180                          -                 -                 -
     Premises and equipment, net                           21,068            20,599            21,291
     Cash value of life insurance                          42,168            40,699            41,768
     Accrued interest receivable                            7,549             6,446             7,641
     Goodwill                                              15,519            15,519            15,519
     Other intangible assets, net                           4,061             5,065             4,407
     Other assets                                          24,823            21,357            21,021
                                                      -------------------------------   -----------------
         Total Assets                                  $1,829,526        $1,655,612        $1,841,275
                                                      ===============================   =================
Liabilities:
     Deposits:
         Noninterest-bearing demand                      $354,514          $312,739          $368,412
         Interest-bearing                               1,172,877         1,086,010         1,128,385
                                                      -------------------------------   -----------------
         Total deposits                                 1,527,391         1,398,749         1,496,797
     Federal funds purchased                               45,800            20,700            96,800
     Accrued interest payable                               5,263             3,384             4,506
     Reserve for unfunded commitments                       1,813             1,632             1,813
     Other liabilities                                     23,783            22,099            19,238
     Other borrowings                                      31,441            28,176            31,390
     Junior subordinated debt                              41,238            41,238            41,238
                                                      -------------------------------   -----------------
         Total Liabilities                              1,676,729         1,515,978         1,691,782
                                                      -------------------------------   -----------------
Commitments and contingencies
Shareholders' Equity:
     Common stock, no par value: 50,000,000 shares authorized;
         issued and outstanding:
           15,778,090 at March 31, 2006                    72,255
           15,733,517 at March 31, 2005                                      70,808
           15,707,835 at December 31, 2005                                                     71,412
     Retained earnings                                     85,872            71,068            81,906
     Accumulated other comprehensive loss, net             (5,330)           (2,242)           (3,825)
                                                      -------------------------------   -----------------
         Total Shareholders' Equity                       152,797           139,634           149,493
                                                      -------------------------------   -----------------
Total Liabilities and Shareholders' Equity             $1,829,526        $1,655,612        $1,841,275
                                                      ===============================   =================



See accompanying notes to unaudited condensed consolidated financial statements.

                                      -2-



                                TRICO BANCSHARES
                        CONSOLIDATED STATEMENTS OF INCOME
                  (In thousands, except share data; unaudited)

                                                    Three months ended March 31,
                                                         2006           2005
                                                    ----------------------------
Interest and dividend income:
Loans, including fees                                  $25,069        $19,527
Debt securities:
Taxable                                                  2,356          2,630
Tax exempt                                                 462            415
Dividends                                                   84             60
Federal funds sold                                           7              4
                                                    ----------------------------
Total interest income                                   27,978         22,636
                                                    ----------------------------
Interest Expense:
Deposits                                                 4,942          3,085
Federal funds purchased                                    750            172
Other borrowings                                           348            327
Junior subordinated debt                                   733            537
                                                    ----------------------------
Total interest expense                                   6,773          4,121
                                                    ----------------------------
Net interest income                                     21,205         18,515
                                                    ----------------------------
Provision for loan losses                                  500            100
                                                    ----------------------------
Net interest income after provision for loan losses     20,705         18,415
                                                    ----------------------------
Noninterest income:
Service charges and fees                                 4,857          4,062
Gain on sale of loans                                      298            292
Commissions on sale of non-deposit investment products     558            532
Increase in cash value of life insurance                   400            220
Other                                                      335            221
                                                    ----------------------------
Total noninterest income                                 6,448          5,327
                                                    ----------------------------
Noninterest expense:
Salaries and related benefits                            9,156          8,369
Other                                                    7,266          6,744
                                                    ----------------------------
Total noninterest expense                               16,422         15,113
                                                    ----------------------------
Income before income taxes                              10,731          8,629
                                                    ----------------------------
Provision for income taxes                               4,196          3,390
                                                    ----------------------------
Net income                                              $6,535         $5,239
                                                    ============================
Average shares outstanding                           15,736,544     15,729,725
Diluted average shares outstanding                   16,379,595     16,366,705

Per share data:
Basic earnings                                           $0.42          $0.33
Diluted earnings                                         $0.40          $0.32
Dividends paid                                           $0.12          $0.11

See accompanying notes to unaudited condensed consolidated financial statements.

                                      -3-





                                TRICO BANCSHARES
           CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY
                  (In thousands, except share data; unaudited)

                                                                     Accumulated
                                   Shares of                            Other
                                    Common     Common    Retained   Comprehensive
                                     Stock      Stock    Earnings       Loss           Total
                                 -------------------------------------------------------------
                                                                         
Balance at December 31, 2004      15,723,317   $70,699    $67,785        ($352)      $138,132
Comprehensive income:                                                               ----------
Net income                                                  5,239                       5,239
Change in net unrealized loss on
   Securities available for sale, net                                   (1,890)        (1,890)
                                                                                    ----------
Total comprehensive income                                                              3,349
Stock options exercised               24,000       158                                    158
Tax benefit of stock options exercised              13                                     13
Repurchase of common stock           (13,800)      (62)      (224)                       (286)
Dividends paid ($0.11 per share)                           (1,732)                     (1,732)
                                 -------------------------------------------------------------
Balance at March 31, 2005         15,733,517   $70,808    $71,068      ($2,242)      $139,634
                                 =============================================================

Balance at December 31, 2005      15,707,835   $71,412    $81,906      ($3,825)      $149,493
Comprehensive income:                                                               ----------
Net income                                                  6,535                       6,535
Change in net unrealized loss on
   Securities available for sale, net                                   (1,505)        (1,505)
                                                                                    ----------
Total comprehensive income                                                              5,030
Stock option vesting                               139                                    139
Stock options exercised              100,380       841                                    841
Repurchase of common stock           (30,125)     (137)      (678)                       (815)
Dividends paid ($0.12 per share)                           (1,891)                     (1,891)
                                 -------------------------------------------------------------
Balance at March 31, 2006         15,778,090   $72,255    $85,872      ($5,330)      $152,797
                                 =============================================================



See accompanying notes to unaudited condensed consolidated financial statements.


                                      -4-





                                TRICO BANCSHARES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                            (In thousands; unaudited)

                                                               For the three months ended March 31,
                                                                     2006               2005
                                                               ------------------------------------
                                                                                   
Operating activities:
  Net income                                                        $6,535             $5,239
  Adjustments to reconcile net income to net cash provided
    by operating activities:
      Depreciation of premises and equipment, and amortization         981                917
      Amortization of intangible assets                                346                343
      Provision for loan losses                                        500                100
      Amortization of investment securities premium, net               242                331
      Originations of loans for resale                             (17,935)           (15,660)
      Proceeds from sale of loans originated for resale             18,064             15,780
      Gain on sale of loans                                           (298)              (292)
      Amortization of mortgage servicing rights                          -                168
      Change in fair value of mortgage servicing rights                (50)                 -
      Loss (gain) on sale of fixed assets                                1                 (6)
      Increase in cash value of life insurance                        (400)              (220)
      Stock option expense                                             139                  -
      Change in:
        Interest receivable                                             92                 27
        Interest payable                                               757                103
        Other assets and liabilities, net                            1,909                616
                                                               ------------------------------------
          Net cash provided by operating activities                 10,883              7,446
                                                               ------------------------------------
Investing activities:
  Proceeds from maturities of securities available-for-sale         13,894             14,244
  Purchases of securities available-for-sale                          (896)           (25,525)
  Purchase of Federal Home Loan Bank stock                             (89)                 -
  Loan originations and principal collections, net                 (15,155)            (9,528)
  Proceeds from sale of premises and equipment                           1                  5
  Purchases of premises and equipment                                 (615)            (1,513)
                                                               ------------------------------------
          Net cash used by investing activities                     (2,860)           (22,317)
                                                               ------------------------------------
Financing activities:
  Net increase in deposits                                          30,594             49,916
  Net change in federal funds purchased                            (51,000)           (25,700)
  Payments of principal on long-term other borrowings                  (14)               (13)
  Net change in short-term other borrowings                             65                 37
  Repurchase of Common Stock                                             -               (286)
  Dividends paid                                                    (1,891)            (1,732)
  Exercise of stock options                                             26                158
                                                               ------------------------------------
          Net cash (used) provided by financing activities         (22,220)            22,380
                                                               ------------------------------------
Net change in cash and cash equivalents                            (14,197)             7,509
                                                               ------------------------------------
Cash and cash equivalents and beginning of period                   92,939             70,037
                                                               ------------------------------------
Cash and cash equivalents at end of period                         $78,742            $77,546
                                                               ====================================
Supplemental disclosure of noncash activities:
  Unrealized loss on securities available for sale                 ($2,597)           ($3,233)
  Value of shares tendered in lieu of cash paid to
    exercise stock options                                            $815                  -
Supplemental disclosure of cash flow activity:
  Cash paid for interest expense                                    $6,016             $4,018
  Cash paid for income taxes                                          $900               $200
  Income tax benefit from stock option exercises                         -                $13



See accompanying notes to unaudited condensed consolidated financial statements.

                                      -5-



NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Note 1: General Summary of Significant Accounting Policies
The accompanying unaudited condensed consolidated financial statements have been
prepared in accordance with generally accepted accounting principles for interim
financial  information  and  pursuant  to  the  rules  and  regulations  of  the
Securities and Exchange  Commission.  The results of operations  reflect interim
adjustments,  all of which are of a normal  recurring  nature and which,  in the
opinion of management,  are necessary for a fair presentation of the results for
the interim periods  presented.  The interim results for the three month periods
ended  March 31,  2006 and 2005 are not  necessarily  indicative  of the results
expected for the full year.  These unaudited  condensed  consolidated  financial
statements should be read in conjunction with the audited consolidated financial
statements and accompanying  notes as well as other information  included in the
Company's Annual Report on Form 10-K for the year ended December 31, 2005.

Principles of Consolidation
The consolidated  financial  statements include the accounts of the Company, and
its  wholly-owned  subsidiary,  Tri Counties Bank (the "Bank").  All significant
intercompany accounts and transactions have been eliminated in consolidation.

Nature of Operations
The Company  operates 32 branch  offices and 19 in-store  branch  offices in the
California  counties of Butte,  Contra Costa, Del Norte,  Fresno,  Glenn,  Kern,
Lake, Lassen, Madera,  Mendocino,  Merced, Nevada, Placer,  Sacramento,  Shasta,
Siskiyou,  Stanislaus,  Sutter,  Tehama,  Tulare,  Yolo and Yuba.  The Company's
operating policy since its inception has emphasized retail banking.  Most of the
Company's customers are retail customers and small to medium sized businesses.

Use of Estimates in the Preparation of Financial Statements
The preparation of financial statements in conformity with accounting principles
generally  accepted in the United States of America requires  Management to make
estimates  and  assumptions  that  affect  the  reported  amounts  of assets and
liabilities  and disclosure of contingent  assets and liabilities at the date of
the  financial  statements  and the  reported  amounts of revenues  and expenses
during the reporting  period.  On an on-going basis,  the Company  evaluates its
estimates,  including  those  related to the adequacy of the  allowance for loan
losses,  investments,  intangible assets,  income taxes and  contingencies.  The
Company  bases its  estimates  on  historical  experience  and on various  other
assumptions  that are believed to be  reasonable  under the  circumstances,  the
results of which form the basis for making  judgments  about the carrying values
of assets and  liabilities  that are not readily  apparent  from other  sources.
Actual results may differ from these estimates  under  different  assumptions or
conditions.  The  allowance  for loan  losses,  goodwill  and  other  intangible
assessments,  income taxes, and the valuation of mortgage  servicing rights, are
the only accounting estimates that materially affect the Company's  consolidated
financial statements.

Significant Group Concentration of Credit Risk
The Company grants agribusiness,  commercial, consumer, and residential loans to
customers  located  throughout the northern San Joaquin  Valley,  the Sacramento
Valley  and  northern  mountain  regions  of  California.   The  Company  has  a
diversified  loan  portfolio  within  the  business  segments  located  in  this
geographical area.

Cash and Cash Equivalents
For  purposes  of the  consolidated  statements  of cash  flows,  cash  and cash
equivalents include cash on hand, amounts due from banks and federal funds sold.

Investment Securities
The Company  classifies its debt and marketable  equity  securities  into one of
three  categories:  trading,  available-for-sale  or  held-to-maturity.  Trading
securities  are bought and held  principally  for the  purpose of selling in the
near term.  Held-to-maturity  securities are those  securities which the Company
has the  ability and intent to hold until  maturity.  All other  securities  not
included in trading or  held-to-maturity  are classified as  available-for-sale.
During the three months ended March 31, 2006, and  throughout  2005, the Company
did not have any securities classified as either held-to-maturity or trading.

                                      -6-



Available-for-sale  securities are recorded at fair value.  Unrealized gains and
losses,  net of the related tax effect,  on  available-for-sale  securities  are
reported as a separate  component  of other  accumulated  comprehensive  loss in
shareholders' equity until realized.

Premiums and  discounts  are  amortized or accreted over the life of the related
investment  security  as an  adjustment  to yield using the  effective  interest
method.  Dividend and interest income are recognized when earned. Realized gains
and losses for  securities  are included in earnings  and are derived  using the
specific  identification  method for  determining  the cost of securities  sold.
Unrealized  losses  due to  fluctuations  in fair  value of  securities  held to
maturity  or  available  for sale are  recognized  through  earnings  when it is
determined that an other than temporary decline in value has occurred.

Federal Home Loan Bank Stock
The Bank is a member of the Federal  Home Loan Bank of San  Francisco  ("FHLB"),
and as a condition of membership,  it is required to purchase stock.  The amount
of FHLB  stock  required  to be  purchased  is based on the  borrowing  capacity
desired by the Bank. While technically  these are considered equity  securities,
there is no market for the FHLB stock.  Therefore,  the shares are considered as
restricted investment securities. Such investment is carried at cost.

Loans Held for Sale
Loans  originated  and intended for sale in the secondary  market are carried at
the  lower  of  aggregate  cost  or  fair  value,  as  determined  by  aggregate
outstanding  commitments from investors of current investor yield  requirements.
Net unrealized losses are recognized through a valuation allowance by charges to
income.  At March 31, 2006 and 2005,  and December 31, 2005,  the Company had no
loans held for sale.

Mortgage  loans held for sale are  generally  sold with the  mortgage  servicing
rights  retained by the Company.  The carrying  value of mortgage  loans sold is
reduced by the cost allocated to the associated mortgage servicing rights. Gains
or losses on sales of  mortgage  loans are  recognized  based on the  difference
between the selling price and the carrying  value of the related  mortgage loans
sold.

Loans
Loans are reported at the principal amount  outstanding,  net of unearned income
and the allowance for loan losses.  Loan  origination  and  commitment  fees and
certain  direct  loan  origination  costs are  deferred,  and the net  amount is
amortized as an adjustment of the related  loan's yield over the estimated  life
of the loan.  Loans on which the accrual of interest has been  discontinued  are
designated  as  nonaccrual  loans.  Accrual of  interest  on loans is  generally
discontinued  either  when  reasonable  doubt  exists  as to  the  full,  timely
collection  of interest or principal or when a loan becomes  contractually  past
due by 90 days or more with respect to interest or principal.  When loans are 90
days past due, but in Management's  judgment are well secured and in the process
of  collection,  they may be  classified  as  accrual.  When a loan is placed on
nonaccrual  status,  all  interest  previously  accrued  but  not  collected  is
reversed.  Income on such loans is then  recognized only to the extent that cash
is received and where the future  collection of principal is probable.  Interest
accruals are resumed on such loans only when they are brought fully current with
respect to interest and principal and when, in the judgment of  Management,  the
loans are estimated to be fully  collectible  as to both principal and interest.
All impaired loans are classified as nonaccrual loans.

Reserve for Unfunded Commitments
The reserve for unfunded  commitments  is  established  through a provision  for
losses - unfunded  commitments charged to noninterest  expense.  The reserve for
unfunded  commitments is an amount that Management  believes will be adequate to
absorb  probable  losses  inherent in  existing  commitments,  including  unused
portions of  revolving  lines of credits  and other  loans,  standby  letters of
credits,  and unused  deposit  account  overdraft  privilege.  The  reserve  for
unfunded  commitments is based on evaluations of the  collectibility,  and prior
loss experience of unfunded commitments. The evaluations take into consideration
such  factors as changes in the nature and size of the loan  portfolio,  overall
loan portfolio quality, loan concentrations,  specific problem loans and related
unfunded  commitments,  and  current  economic  conditions  that may  affect the
borrower's or depositor's ability to pay.

                                      -7-



Allowance for Loan Losses
The allowance for loan losses is established through a provision for loan losses
charged to expense. Loans and deposit related overdrafts are charged against the
allowance for loan losses when Management  believes that the  collectibility  of
the  principal  is unlikely  or, with  respect to  consumer  installment  loans,
according to an  established  delinquency  schedule.  The allowance is an amount
that Management  believes will be adequate to absorb probable losses inherent in
existing  loans  and  leases,   based  on  evaluations  of  the  collectibility,
impairment and prior loss experience of loans and leases.  The evaluations  take
into  consideration  such  factors  as  changes  in the  nature  and size of the
portfolio,  overall portfolio  quality,  loan  concentrations,  specific problem
loans, and current economic conditions that may affect the borrower's ability to
pay. The Company defines a loan as impaired when it is probable the Company will
be unable to collect all amounts due according to the  contractual  terms of the
loan  agreement.  Impaired  loans are  measured  based on the  present  value of
expected future cash flows discounted at the loan's original  effective interest
rate. As a practical  expedient,  impairment may be measured based on the loan's
observable  market  price or the fair  value  of the  collateral  if the loan is
collateral  dependent.  When the measure of the  impaired  loan is less than the
recorded  investment in the loan, the impairment is recorded through a valuation
allowance.

Credit  risk is inherent in the  business of lending.  As a result,  the Company
maintains  an  allowance  for loan  losses  to  absorb  losses  inherent  in the
Company's  loan  portfolio.  This is  maintained  through  periodic  charges  to
earnings.  These  charges are shown in the  Consolidated  Income  Statements  as
provision for loan losses. All specifically identifiable and quantifiable losses
are  immediately  charged off against the allowance.  However,  for a variety of
reasons,  not all losses are immediately known to the Company and, of those that
are known,  the full extent of the loss may not be quantifiable at that point in
time.  The balance of the Company's  allowance for loan losses is meant to be an
estimate of these unknown but probable  losses  inherent in the  portfolio.  For
purposes of this discussion, "loans" shall include all loans and lease contracts
that are part of the Company's portfolio.

The Company  formally  assesses  the  adequacy of the  allowance  on a quarterly
basis.  Determination  of the  adequacy is based on ongoing  assessments  of the
probable  risk in the  outstanding  loan  portfolio,  and to a lesser extent the
Company's loan commitments. These assessments include the periodic re-grading of
credits based on changes in their individual  credit  characteristics  including
delinquency,  seasoning,  recent financial performance of the borrower, economic
factors, changes in the interest rate environment,  growth of the portfolio as a
whole or by segment, and other factors as warranted.  Loans are initially graded
when  originated.  They are  re-graded as they are renewed,  when there is a new
loan to the same borrower,  when identified facts demonstrate heightened risk of
nonpayment,  or if they become  delinquent.  Re-grading of larger  problem loans
occur at least quarterly.  Confirmation of the quality of the grading process is
obtained by  independent  credit reviews  conducted by consultants  specifically
hired for this purpose and by various bank regulatory agencies.

The Company's method for assessing the appropriateness of the allowance for loan
losses and the reserve for unfunded commitments includes specific allowances for
identified problem loans and leases as determined by SFAS 114, formula allowance
factors for pools of credits, and allowances for changing  environmental factors
(e.g., interest rates, growth, economic conditions, etc.). Allowance factors for
loan  pools are based on the  previous 5 years  historical  loss  experience  by
product type.  Allowances  for specific  loans are based on SFAS 114 analysis of
individual   credits.   Allowances  for  changing   environmental   factors  are
Management's  best estimate of the probable impact these changes have had on the
loan  portfolio as a whole.  This process is explained in detail in the notes to
the  Company's  Consolidated  Financial  Statements in its Annual Report on Form
10-K for the year ended December 31, 2005.

Based on the current conditions of the loan portfolio,  Management believes that
the  allowance for loan losses and the reserve for unfunded  commitments,  which
collectively  stand at  $18,457,000  at March 31,  2006,  are adequate to absorb
probable losses  inherent in the Company's loan  portfolio.  No assurance can be
given, however, that adverse economic conditions or other circumstances will not
result in increased losses in the portfolio.

                                      -8-



The  following  tables  summarize the activity in the allowance for loan losses,
reserve for unfunded  commitments,  and allowance for losses (which is comprised
of the allowance for loan losses and the reserve for unfunded  commitments)  for
the periods indicated (dollars in thousands):

                                         Three months ended March 31,
                                         ----------------------------
                                              2006          2005
                                         ----------------------------
     Allowance for loan losses:
     Balance at beginning of period         $16,226       $14,525
     Provision for loan losses                  500           100
     Loans charged off                         (357)         (295)
     Recoveries of previously
       charged-off loans                        275           233
                                         ----------------------------
         Net charge-offs                        (82)          (62)
                                         ----------------------------
     Balance at end of period               $16,644       $14,563
                                         ============================
     Reserve for unfunded commitments:
     Balance at beginning of period          $1,813        $1,532
     Provision for losses -
       unfunded commitments                       -           100
                                         ----------------------------
     Balance at end of period                $1,813        $1,632
                                         ============================
       Balance at end of period:
     Allowance for loan losses              $16,644       $14,563
     Reserve for unfunded commitments         1,813         1,632
                                         ----------------------------
     Allowance for losses                   $18,457       $16,195
                                         ============================
     As a percentage of total loans:
     Allowance for loan losses                1.19%         1.23%
     Reserve for unfunded commitments         0.13%         0.14%
                                         ----------------------------
     Allowance for losses                     1.32%         1.37%
                                         ============================

Mortgage Servicing Rights
Mortgage  servicing  rights (MSRs)  represent  the  Company's  right to a future
stream of cash flows based upon the  contractual  servicing fee associated  with
servicing mortgage loans. Our MSRs arise from residential mortgage loans that we
originate  and sell,  but retain the right to  service  the loans.  For sales of
residential  mortgage  loans, a portion of the cost of  originating  the loan is
allocated to the  servicing  right based on relative fair values of the loan and
the servicing  right.  The net gain from the retention of the servicing right is
included in gain on sale of loans in  noninterest  income when the loan is sold.
Fair  value  is  based  on  market  prices  for  comparable  mortgage  servicing
contracts, when available, or alternatively,  is based on a valuation model that
calculates  the present  value of estimated  future net  servicing  income.  The
valuation model incorporates  assumptions that market  participants would use in
estimating  future  net  servicing  income,  such as the  cost to  service,  the
discount rate, the custodial earnings rate, an inflation rate, ancillary income,
prepayment  speeds and  default  rates and  losses.  MSRs are  included in other
assets. Servicing fees are recorded in noninterest income when earned.

Effective with the Company's early adoption of SFAS 156, beginning as of January
1, 2006 MSRs are carried at fair value,  with changes in fair value  reported in
noninterest  income  in the  period  in which the  change  occurs.  On or before
December  31, 2005,  MSRs were carried at the lower of amortized  cost or market
value.  The  cumulative  effect  related  to the  adoption  of  this  change  in
accounting from lower of amortized cost or market value to fair value on January
1, 2006 was immaterial.

The determination of fair value of our MSRs requires management judgment because
they are not actively traded.  The determination of fair value for MSRs requires
valuation  processes  which combine the use of  discounted  cash flow models and
extensive  analysis  of current  market  data to arrive at an  estimate  of fair
value. The cash flow and prepayment assumptions used in our discounted cash flow
model are based on empirical data drawn from the  historical  performance of our
MSRs,   which  we  believe  are  consistent  with  assumptions  used  by  market
participants  valuing similar MSRs, and from data obtained on the performance of
similar MSRs. The key assumptions used in the valuation of MSRs include mortgage
prepayment  speeds and the discount  rate.  These  variables  can, and generally
will, change from quarter to quarter as market conditions and projected interest
rates change.  The key risks inherent with MSRs are prepayment speed and changes
in interest rates.

                                      -9-



The following tables summarize the activity in, and the main assumptions we used
to  determine  the fair  value of  mortgage  servicing  rights  for the  periods
indicated (dollars in thousands):

                                         Three months ended March 31,
                                         ----------------------------
                                              2006         2005
Mortgage servicing rights:
Balance at beginning of period               $3,638       $3,476
Additions                                       169          172
Amortization                                      -         (168)
Change in fair value                             50            -
                                         ----------------------------
Balance at end of period                     $3,857       $3,480
                                         ============================
Servicing fees received                        $237         $231
Balance of loans serviced at:
     Beginning of period                   $373,163     $368,435
     End of period                         $376,988     $365,156
Weighted-average prepayment speed (CPR)       10.5%        11.7%
Discount rate                                 10.0%        10.0%


Off-Balance Sheet Credit Related Financial Instruments
In the ordinary course of business,  the Company has entered into commitments to
extend credit, including commitments under credit card arrangements,  commercial
letters of credit, and standby letters of credit. Such financial instruments are
recorded when they are funded.

Premises and Equipment
Land is carried at cost. Buildings and equipment, including those acquired under
capital  lease,   are  stated  at  cost  less   accumulated   depreciation   and
amortization.  Depreciation  and  amortization  expenses are computed  using the
straight-line  method over the estimated  useful lives of the related  assets or
lease terms.  Asset lives range from 3-10 years for  furniture and equipment and
15-40 years for land improvements and buildings.

Foreclosed Assets
Assets acquired  through,  or in lieu of, loan foreclosure are held for sale and
are initially recorded at fair value at the date of foreclosure,  establishing a
new cost basis.  Subsequent to  foreclosure,  management  periodically  performs
valuations  and the assets are carried at the lower of  carrying  amount or fair
value less cost to sell. Revenue and expenses from operations and changes in the
valuation allowance are included in other noninterest expense.

Goodwill and Other Intangible Assets
Goodwill  represents the excess of costs over fair value of assets of businesses
acquired.  Goodwill and other intangible  assets acquired in a purchase business
combination and determined to have an indefinite  useful life are not amortized,
but instead  tested for  impairment at least  annually.  Intangible  assets with
estimable  useful lives are amortized  over their  respective  estimated  useful
lives to their estimated residual values, and reviewed for impairment.

The  Company has  identifiable  intangible  assets  consisting  of core  deposit
premiums and minimum  pension  liability.  Core deposit  premiums are  amortized
using an  accelerated  method  over a period  of ten  years.  Intangible  assets
related to minimum pension  liability are adjusted annually based upon actuarial
estimates.

                                      -10-



The following  table  summarizes  the Company's  core deposit  intangibles as of
March 31, 2006 and December 31, 2005.

                                  December 31,                         March 31,
  (Dollar in Thousands)              2005      Additions   Reductions    2006
                                  ----------------------------------------------
   Core deposit intangibles        $13,643           -            -     $13,643
   Accumulated amortization        (10,582)          -        ($346)    (10,928)
                                  ----------------------------------------------
   Core deposit intangibles, net    $3,061           -        ($346)     $2,715
                                  ==============================================

Core deposit  intangibles are amortized over their expected  useful lives.  Such
lives are  periodically  reassessed  to  determine  if any  amortization  period
adjustments are indicated.

The following table summarizes the Company's  estimated core deposit  intangible
amortization for each of the five succeeding years:

                                               Estimated Core Deposit
                                               Intangible Amortization
                 Years Ended                    (Dollar in thousands)
                 -----------                   -----------------------
                     2006                               $1,395
                     2007                                 $490
                     2008                                 $523
                     2009                                 $328
                     2010                                 $260
                 Thereafter                                $65

The  following  table  summarizes  the  Company's   minimum  pension   liability
intangible as of March 31, 2006 and December 31, 2005.

                                  December 31,                         March 31,
  (Dollar in Thousands)              2005      Additions   Reductions    2006
                                  ----------------------------------------------
  Minimum pension liability
   intangible                       $1,346          -            -      $1,346
                                  ==============================================

Intangible  assets related to minimum  pension  liability are adjusted  annually
based upon actuarial estimates.

The following table summarizes the Company's goodwill intangible as of March 31,
2006 and December 31, 2005.

                                  December 31,                         March 31,
  (Dollar in Thousands)              2005      Additions   Reductions    2006
                                  ----------------------------------------------
   Goodwill                         $15,519         -            -      $15,519
                                  ==============================================

Impairment of Long-Lived Assets and Goodwill
Long-lived  assets,  such as premises and equipment,  and purchased  intangibles
subject to amortization,  are reviewed for impairment whenever events or changes
in  circumstances  indicate  that the  carrying  amount  of an asset  may not be
recoverable.  Recoverability  of  assets  to be held and used is  measured  by a
comparison of the carrying amount of an asset to estimated  undiscounted  future
cash flows expected to be generated by the asset.  If the carrying  amount of an
asset  exceeds  its  estimated  future  cash  flows,  an  impairment  charge  is
recognized  by the amount by which the carrying  amount of the asset exceeds the
fair value of the asset. Assets to be disposed of would be separately  presented
in the balance  sheet and reported at the lower of the  carrying  amount or fair
value  less  costs  to sell,  and are no  longer  depreciated.  The  assets  and
liabilities of a disposed  group  classified as held for sale would be presented
separately in the appropriate asset and liability sections of the balance sheet.

                                      -11-



On December 31 of each year,  goodwill is tested for  impairment,  and is tested
for impairment  more  frequently if events and  circumstances  indicate that the
asset might be impaired. An impairment loss is recognized to the extent that the
carrying amount exceeds the asset's fair value.  This  determination  is made at
the  reporting  unit  level  and  consists  of two  steps.  First,  the  Company
determines  the fair value of a reporting  unit and  compares it to its carrying
amount.  Second,  if the  carrying  amount of a reporting  unit exceeds its fair
value, an impairment loss is recognized for any excess of the carrying amount of
the reporting unit's goodwill over the implied fair value of that goodwill.  The
implied fair value of goodwill is determined by allocating the fair value of the
reporting unit in a manner similar to a purchase price allocation.  The residual
fair value after this allocation is the implied fair value of the reporting unit
goodwill.

Income Taxes
The  Company's  accounting  for income taxes is based on an asset and  liability
approach.  The Company  recognizes the amount of taxes payable or refundable for
the current  year,  and deferred tax assets and  liabilities  for the future tax
consequences  that have  been  recognized  in its  financial  statements  or tax
returns.  The  measurement  of  tax  assets  and  liabilities  is  based  on the
provisions of enacted tax laws.

Stock-Based Compensation
On  January  1, 2006 the  Company  adopted  Statement  of  Financial  Accounting
Standards No. 123 (revised  2004),  Share-Based  Payment (SFAS 123R),  using the
modified-prospective   transition   method.   Under  this   transition   method,
compensation  cost recognized  during the quarter ended March 31, 2006 includes:
(a) compensation  cost for all share-based  awards granted prior to, but not yet
vested as of, January 1, 2006,  based on the  grant-date  fair value and related
service period estimates in accordance with the original  provisions of SFAS 123
and (b)  compensation  cost for all  share-based  awards  granted  subsequent to
January 1, 2006,  based on the grant-date fair value and related service periods
estimated in accordance  with the provisions of SFAS 123R.  Under the provisions
of the  modified-prospective  transition  method,  results for the three  months
ended March 31, 2005 have not been restated. Historically, stock options are the
only type of share-based award granted by the Company.

Prior to the adoption of SFAS 123R, the Company used the intrinsic  value method
to account for its stock  option plans (in  accordance  with the  provisions  of
Accounting  Principles Board Opinion No. 25).  Intrinsic value is the difference
between share fair market value and option  exercise  price.  Under this method,
compensation  expense was recognized for awards of options to purchase shares of
common stock to employees under compensatory plans only if the fair market value
of the stock at the option grant date (or other  measurement date, if later) was
greater  than the amount the  employee was required to pay to acquire the stock.
Statement of Financial  Accounting Standards No. 123, Accounting for Stock-Based
Compensation  (SFAS 123),  permitted  companies to continue  using the intrinsic
value  method or to adopt a fair value based  method to account for stock option
plans.  The fair value based method would have resulted in the  recognition,  as
expense over the vesting period, of the fair value of all stock-based  awards on
the date of grant.

SFAS 123R  clarifies  and expands  the  guidance  in SFAS 123  inseveral  areas,
including  measuring fair value and attributing  compensation  cost to reporting
periods. SFAS 123R includes a requirement to: (a) estimate forfeitures of share-
based awards at the date of grant,  (b) expense  share-based  awards  granted to
retirement   eligible   employees  and  those  employees  with   non-substantive
non-compete agreements  immediately,  (c) attribute compensation costs of share-
based  award  grants  to  the  stated  future  vesting  period,   (d)  recognize
compensation cost of all share-based awards based upon the grant-date fair value
(including pre-2006 options).

The Company did not recognize  any gain or loss  resulting  from the  cumulative
effect of a change in accounting principle upon adoption of SFAS 123R on January
1, 2006. Based on the stock-based compensation awards outstanding as of December
31,  2005,  for which the  requisite  service  was not fully  rendered  prior to
January 1,  2006,  and any  subsequent  option grants as of March 31, 2006,  the
Company expects to recognize total pre-tax  compensation  cost of  approximately
$869,000  related to  outstanding  stock option  grants,  of which  $139,000 was
recognized  in the first  quarter of 2006,  in  accordance  with the  accounting
requirements  of  SFAS 123R.  The  after-tax  effect of adopting SFAS 123R was a
reduction of net income of $100,000 and $0, and a reduction in diluted  earnings
per  share  of  $0.006  and $0,  for  the  first  quarters  of  2006  and  2005,
respectively.   Future  levels  of  compensation  cost  recognized   related  to
stock-based   compensation   awards  may  be  impacted  by  new  awards   and/or
modifications, repurchases and cancellations of existing awards before and after
the adoption SFAS 123R.

                                      -12-



For the  three  months  ended  March  31,  2005, had  compensation  costfor  the
Company's option plans been determined using the fair-value  method of SFAS 123,
the  Company's  net income and earnings per share would have been reduced to the
pro forma amounts indicated below:

(in thousands, except per share amounts)

Net income                                As reported            $5,239
                                            Pro forma            $5,153
Basic earnings per share                  As reported             $0.33
                                            Pro forma             $0.33
Diluted earnings per share                As reported             $0.32
                                            Pro forma             $0.31
Stock-based employee compensation
   cost, net of related tax effects,      As reported                $0
   included in net income                   Pro forma               $86

The fair value of each option  grant is estimated on the date of grant using the
Black-Scholes option-pricing model.

In May 2001,  the Company  adopted the TriCo  Bancshares  2001 Stock Option Plan
(2001 Plan) covering officers,  employees,  directors of, and consultants to the
Company.  Under the 2001  Plan,  the option  price  cannot be less than the fair
market  value of the  Common  Stock at the date of grant  except  in the case of
substitute options. Options for the 2001 Plan expire on the tenth anniversary of
the  grant  date.   Vesting   schedules  under  the  2001  Plan  are  determined
individually for each grant.

In May 1995,  the Company  adopted the TriCo  Bancshares  1995  Incentive  Stock
Option Plan (1995 Plan) covering key employees.  Under the 1995 Plan, the option
price  cannot be less than the fair market value of the Common Stock at the date
of grant. Options for the 1995 Plan expire on the tenth anniversary of the grant
date. Vesting schedules under the 1995 Plan are determined individually for each
grant.

As of March 31, 2006,  options for the  purchase of 502,436 and 0 common  shares
remained available for grant under the 2001 and 1995 Plans, respectively. Shares
issued  under the  Company's  option  plans are "new issue"  shares  rather than
treasury shares.

Stock  option  activity  for the three  months  ended March 31, 2006 and 2005 is
summarized in the following tables:

                                                            Weighted   Weighted
                                                             Average    Average
                         Number          Option Price       Exercise  Fair Value
                        Of Shares          Per Share          Price    of Grants
Outstanding at
  December 31, 2005     1,636,762     $5.65   to  $20.58     $11.44
   Options granted              -         -   to       -           -         -
   Options exercised     (100,380)    $7.08   to   $9.13       $8.37
   Options forfeited            -         -   to       -           -
Outstanding at         -----------------------------------------------
  March 31, 2006        1,536,382     $5.65   to  $20.58      $11.64
                       ===============================================

Outstanding at
  December 31, 2004     1,661,547     $2.62   to  $17.40     $10.52
   Options granted         65,000    $19.35   to  $19.35     $19.35      $4.56
   Options exercised      (24,000)    $5.37   to  $12.60      $6.57
   Options forfeited         (496)    $5.65   to   $5.65      $5.65
Outstanding at         -----------------------------------------------
  March 31, 2005        1,702,051     $2.62   to  $19.35     $10.91
                       ===============================================

                                      -13-



During the three  months ended March 31, 2006,  the  intrinsic  value of options
exercised  and the  fair  value of  options  that  vested  were  $1,879,000  and
$139,000,  respectively.  No options were granted  during the three months ended
March 31, 2006.

During the three  months ended March 31, 2005,  the  intrinsic  value of options
exercised  and the fair value of options that vested were $353,000 and $169,000,
respectively.  The fair value of options  granted  during the three months ended
March  31,  2005  was  based  on the  following  expectations:  term of 8 years,
volatility of 20.5%, annual rate of quarterly dividends of 2.27%, and a discount
rate of 4.00%.

The total  intrinsic value of stock options  exercised  during the quarter ended
March 31, 2006 was $1,879,000 for which no  compensation  costs were  previously
recognized nor tax benefits  recognized in equity upon  issuance.  Cash received
from the exercise of stock options  during the three months ended March 31, 2006
totaled $26,000.  In addition,  30,125 shares of the Company's common stock with
market value of $815,000 were tendered by optionees  and  repurchased  at market
value by the  Company,  in lieu of cash,  to exercise  options  during the three
months ended March 31, 2006 as permitted by the Company's option plans.

The following table shows the number,  weighted-average  exercise price, and the
weighted  average  remaining  contractual life of options  outstanding,  and the
number and  weighted-average  exercise price of options  exercisable as of March
31, 2006 by range of exercise price:




                                        Outstanding Options                            Exercisable Options
                      --------------------------------------------------------    -----------------------------
                                                          Weighted-Average
  Range of                          Weighted-Average         Remaining                        Weighted-Average
Exercise Price         Number        Exercise Price    Contractual Term (yrs.)    Number        Exercise Price
                                                                                       
    $4-$6               1,442             $5.82                3.83                1,442             $5.82
    $6-$8              30,000             $6.13                0.23               30,000             $6.13
    $8-$10            734,420             $8.24                4.76              734,420             $8.24
   $10-$12             40,000            $11.72                6.69               26,666            $11.72
   $12-$14            387,000            $12.71                7.17              293,666            $12.69
   $16-$18            231,520            $17.38                7.92              158,105            $17.38
   $18-$20             65,000            $19.35                8.90               27,084            $19.35
   $20-$22             47,000            $20.58                9.15               36,831            $20.58



The following table shows the number, weighted-average exercise price, intrinsic
value,  weighted average remaining  contractual life,  average remaining vesting
period,  and remaining  compensation  cost to be  recognized  over the remaining
vesting  period of  options  exercisable,  options  not yet  exercisable,  total
options outstanding as of March 31, 2006:




                                                      Currently    Currently Not      Total
(dollars in thousands except exercise price)         Exercisable     Exercisable   Outstanding
                                                                              
Number of options                                     1,308,214        228,168      1,536,382
Weighted average exercise price                          $10.94         $15.65         $11.64
Intrinsic value                                         $22,737         $2,891        $25,628
Weighted average remaining contractual term (yrs.)         5.82           7.77           6.11



The 228,168 options that are not currently  exercisable as of March 31, 2006 are
expected to vest, on a weighted-average basis, over the next 1.80 years, and the
Company is expected to recognize $730,000 of compensation costs related to these
options as they vest.

                                      -14-



Earnings Per Share
Basic  earnings per share  represents  income  available to common  shareholders
divided by the  weighted-average  number of common shares outstanding during the
period.  Diluted earnings per share reflects additional common shares that would
have been outstanding if dilutive  potential  common shares had been issued,  as
well as any  adjustments  to income  that would  result from  assumed  issuance.
Potential  common  shares that may be issued by the Company  relate  solely from
outstanding  stock options,  and are determined using the treasury stock method.
In applying  the treasury  method,  the Company uses the entire tax benefit that
would result from the assumed issuance.

Earnings per share have been computed based on the following:

                                                    Three Months Ended March 31,
                                                       2006            2005
                                                    ----------------------------
                                                           (in thousands)
Net income                                            $6,535          $5,239
Average number of common shares outstanding           15,737          15,730
Effect of dilutive stock options                         643             637
                                                    ----------------------------
Average number of common shares outstanding
   used to calculate diluted earnings per share       16,380          16,367
                                                    ============================

There were no options  excluded  from the  computation  of diluted  earnings per
share for the three month periods  ended March 31, 2006 and 2005,  respectively,
because the effect of these options was antidilutive.

Comprehensive Income
Accounting principles generally require that recognized revenue, expenses, gains
and losses be  included in net income.  Although  certain  changes in assets and
liabilities,   such  as  unrealized  gains  and  losses  on   available-for-sale
securities,  are reported as a separate  component of the equity  section of the
balance  sheet,   such  items,   along  with  net  income,   are  components  of
comprehensive income.

The  components  of other  comprehensive  loss and  related  tax  effects are as
follows:

                                         Three Months Ended March 31,
                                             2006             2005
                                         ----------------------------
                                                (in thousands)
Unrealized holding losses on
  available-for-sale securities            ($2,597)         ($3,233)
Tax effect                                   1,092            1,343
                                         ----------------------------
  Unrealized holding losses on
    available-for-sale securities,
    net of tax                             ($1,505)         ($1,890)
                                         ============================

The   components  of  accumulated   other   comprehensive   loss,   included  in
shareholders' equity, are as follows:

                                          March 31,      December 31,
                                            2006             2005
                                         ----------------------------
                                                (in thousands)
Net unrealized losses on
   available-for-sale securities          ($7,347)         ($4,750)
Tax effect                                  3,089            1,997
                                         ----------------------------
  Unrealized holding losses on
     available-for-sale securities,
     net of tax                            (4,258)          (2,753)
                                         ----------------------------
Minimum pension liability                  (1,851)          (1,851)
Tax effect                                    779              779
                                         ----------------------------
  Minimum pension liability, net of tax    (1,072)          (1,072)
                                         ----------------------------
Accumulated other comprehensive loss      ($5,330)         ($3,825)
                                         ============================

                                      -15-



Retirement Plans
The Company has  supplemental  retirement plans for current and former directors
and  supplemental  retirement  plan covering  current and former key executives.
These  plans are  non-qualified  defined  benefit  plans and are  unsecured  and
unfunded.  The Company has purchased  insurance on the lives of the participants
and  intends  to use the cash  values of these  policies  to pay the  retirement
obligations.

The following table sets forth the net periodic  benefit cost recognized for the
plans:

                                                    Three Months Ended March 31,
                                                       2006            2005
                                                           (in thousands)
                                                    ----------------------------
Net pension cost included the following components:
Service cost-benefits earned during the period         $139            $104
Interest cost on projected benefit obligation           132             133
Amortization of net obligation at transition              -              56
Amortization of prior service cost                       50              24
Recognized net actuarial loss                            34               1
                                                    ----------------------------
Net periodic pension cost                              $355            $318
                                                    ============================

During the three months ended March 31, 2006 and 2005,  the Company  contributed
and paid out as benefits  $151,000 and $152,000,  respectively,  to participants
under the plans.  For the year ending  December 31, 2006, the Company expects to
contribute and pay out as benefits $530,000 to participants under the plans.

Recent Accounting Pronouncements
In December 2004, the Financial  Accounting  Standards  Board (FASB) issued FASB
Statement of Financial Accounting Standards No. 123 (revised 2004),  Share-Based
Payment (SFAS 123R),  which replaces SFAS No. 123,  Accounting  for  Stock-Based
Compensation, (SFAS 123) and supersedes APB Opinion No. 25, Accounting for Stock
Issued to Employees.  SFAS 123R requires all share-based  payments to employees,
including  grants of employee stock  options,  to be recognized in the financial
statements based on their fair values beginning with the first interim reporting
period of the Company's  fiscal year beginning  after June 15, 2005,  with early
adoption encouraged.  The pro forma disclosures  previously permitted under SFAS
123 no longer will be an alternative  to financial  statement  recognition.  The
Company  adopted  SFAS 123R on  January  1, 2006  using a  modified  version  of
prospective  application  ("modified prospective  application").  Under modified
prospective  application,  as it is applicable to the Company, SFAS 123R applies
to new grants and to grants modified, repurchased, or cancelled after January 1,
2006.  Additionally,  compensation  cost for the portion of grants for which the
requisite  service has not been  rendered  (generally  referring  to  non-vested
grants) that are  outstanding  as of January 1, 2006 must be  recognized  as the
remaining  requisite service is rendered during the period of and/or the periods
after the adoption of SFAS 123R. The attribution of compensation  cost for those
earlier grants will be based on the same method and on the same  grant-date fair
values  previously  determined  for  the  pro  forma  disclosures  required  for
companies that did not adopt the fair value  accounting  method for  stock-based
employee compensation.

The Company did not recognize  any gain or loss  resulting  from the  cumulative
effect of a change in accounting principle upon adoption of SFAS 123R on January
1, 2006. Based on the stock-based compensation awards outstanding as of December
31,  2005,  for which the  requisite  service  was not fully  rendered  prior to
January 1, 2006,  and any  subsequent  option  grants as of March 31, 2006,  the
Company expects to recognize total pre-tax  compensation  cost of  approximately
$869,000  related to  outstanding  stock option  grants,  of which  $139,000 was
recognized  in the first  quarter of 2006,  in  accordance  with the  accounting
requirements  of SFAS 123R.  The  after-tax  effect of adopting  SFAS 123R was a
reduction of net income of $100,000 and $0, and a reduction in diluted  earnings
per  share  of  $0.006  and $0,  for  the  first  quarters  of  2006  and  2005,
respectively.   Future  levels  of  compensation  cost  recognized   related  to
stock-based   compensation   awards  may  be  impacted  by  new  awards   and/or
modifications, repurchases and cancellations of existing awards before and after
the adoption SFAS 123R.

                                      -16-



In March 2006, the FASB issued FASB Statement of Financial  Accounting Standards
No. 156,  Accounting for Servicing of Financial Assets,  (SFAS 156) an amendment
of FASB Statement No. 140. SFAS 156 requires all separately-recognized servicing
assets and  liabilities  to be  initially  measured at fair  value,  and permits
companies to elect, on a  class-by-class  basis, to account for servicing assets
and  liabilities on either a lower of cost or market value basis or a fair value
measurement basis.

The Company elected to early adopt SFAS 156 as of January 1, 2006 and to measure
residential  mortgage  servicing  rights  (MSRs) at fair value.  At December 31,
2005,  MSRs were  accounted  for at the lower of amortized  cost or market value
basis.  As a result of adopting  SFAS 156, the Company' s adjustment  to opening
retained earnings as of January 1, 2006,  representing the effect of remeasuring
all MSRs that  existed at December  31, 2005 from a lower of  amortized  cost or
market basis to a fair value basis, was immaterial.

Reclassifications
Certain amounts previously  reported in the 2005 financial  statements have been
reclassified to conform to the 2006 presentation.  These  reclassifications  did
not affect previously reported net income or total shareholders' equity.



                                      -17-



                                TRICO BANCSHARES
                                Financial Summary
                    (in thousands, except per share amounts)

                                                           (Unaudited)
                                                       Three months ended
                                                            March 31,
                                                --------------------------------
                                                     2006              2005
                                                --------------------------------

Net Interest Income (FTE)                          $21,468           $18,756
Provision for loan losses                             (500)             (100)
Noninterest income                                   6,448             5,327
Noninterest expense                                (16,422)          (15,113)
Provision for income taxes (FTE)                    (4,459)           (3,631)
                                                --------------------------------
Net income                                          $6,535            $5,239
                                                ================================

Earnings per share:
     Basic                                           $0.42             $0.33
     Diluted                                         $0.40             $0.32
Per share:
     Dividends paid                                  $0.12             $0.11
     Book value at period end                         9.68              8.88
     Tangible book value at period end                8.44              7.57

Average common shares outstanding                   15,737            15,730
Average diluted common shares outstanding           16,380            16,367
Shares outstanding at period end                    15,778            15,734
At period end:
     Loans, net                                 $1,383,464        $1,167,870
     Total assets                                1,829,526         1,655,612
     Total deposits                              1,527,391         1,398,749
     Other borrowings                               31,441            28,176
     Junior subordinated debt                       41,238            41,238
     Shareholders' equity                          152,797           139,634

Financial Ratios:
During the period (annualized):
     Return on assets                                1.43%             1.29%
     Return on equity                               16.93%            14.83%
     Net interest margin(1)                          5.21%             5.12%
     Net loan charge-offs to average loans           0.01%             0.01%
     Efficiency ratio(1)                            58.83%            62.75%
     Average equity to average assets                8.47%             8.67%
At period end:
     Equity to assets                                8.35%             8.43%
     Total capital to risk-adjusted assets          11.09%            11.91%
     Allowance for losses to loans(2)                1.32%             1.37%

(1)  Fully taxable equivalent (FTE)
(2)  Allowance  for losses  includes  allowance  for loan losses and reserve for
     unfunded commitments.

                                      -18-



Item 2. Management's  Discussion and Analysis of Financial Condition and Results
of Operations

As TriCo  Bancshares (the  "Company") has not commenced any business  operations
independent of Tri Counties Bank (the "Bank"), the following discussion pertains
primarily  to the  Bank.  Average  balances,  including  such  balances  used in
calculating  certain financial ratios, are generally  comprised of average daily
balances  for the  Company.  Within  Management's  Discussion  and  Analysis  of
Financial Condition and Results of Operations,  interest income and net interest
income are generally presented on a fully tax-equivalent (FTE) basis.

Critical Accounting Policies and Estimates
The Company's  discussion and analysis of its financial condition and results of
operations are based upon the Company's consolidated financial statements, which
have been prepared in accordance with accounting  principles  generally accepted
in the United States. The preparation of these financial statements requires the
Company to make  estimates  and  judgments  that affect the reported  amounts of
assets, liabilities, revenues and expenses, and related disclosure of contingent
assets  and  liabilities.  On an  on-going  basis,  the  Company  evaluates  its
estimates,  including  those  related to the adequacy of the  allowance for loan
losses, intangible assets, and contingencies. The Company bases its estimates on
historical  experience and on various other  assumptions that are believed to be
reasonable  under the  circumstances,  the  results  of which form the basis for
making  judgments about the carrying  values of assets and liabilities  that are
not readily  apparent from other  sources.  Actual results may differ from these
estimates under different assumptions or conditions. (See caption "Allowance for
Loan Losses" for a more detailed discussion).

Results of Operations
The  following   discussion  and  analysis  is  designed  to  provide  a  better
understanding  of the significant  changes and trends related to the Company and
the  Bank's  financial  condition,   operating  results,   asset  and  liability
management,  liquidity and capital  resources and should be read in  conjunction
with the  Condensed  Consolidated  Financial  Statements  of the Company and the
Notes thereto located at Item 1 of this report.

The Company had quarterly  earnings of  $6,535,000,  or $0.40 per diluted share,
for the three  months  ended March 31,  2006.  These  results  represent a 25.0%
increase from the $0.32 earnings per diluted share reported for the three months
ended March 31, 2005 on earnings of $5,239,000.  The improvement in results from
the  year-ago  quarter  was  due  to a  $2,712,000  (14.5%)  increase  in  fully
tax-equivalent  net interest  income to  $21,468,000,  and a $1,121,000  (21.0%)
increase in noninterest income. These contributing factors were partially offset
by a $400,000  (400%)  increase in  provision  for loan losses to $500,000 and a
$1,309,000 (8.7%) increase in noninterest expense to $16,422,000 for the quarter
ended March 31, 2006.

Following is a summary of the components of fully taxable equivalent ("FTE") net
income for the periods indicated (dollars in thousands):

                                                       Three months ended
                                                            March 31,
                                                    -------------------------
                                                      2006             2005
                                                    -------------------------

Net Interest Income (FTE)                           $21,468          $18,756
Provision for loan losses                              (500)            (100)
Noninterest income                                    6,448            5,327
Noninterest expense                                 (16,422)         (15,113)
Provision for income taxes (FTE)                     (4,459)          (3,631)
                                                    -------------------------
Net income                                           $6,535           $5,239
                                                    =========================

                                      -19-



Net Interest Income
Following is a summary of the components of net interest  income for the periods
indicated (dollars in thousands):
                                             Three months ended
                                                  March 31,
                                      --------------------------------
                                           2006               2005
                                      --------------------------------
     Interest income                      $27,978            $22,636
     Interest expense                      (6,773)            (4,121)
     FTE adjustment                           263                241
                                      --------------------------------
        Net interest income (FTE)         $21,468            $18,756
                                      ================================
     Average earning assets            $1,646,777         $1,464,028

     Net interest margin (FTE)              5.21%              5.12%

The  Company's  primary  source  of  revenue  is  net  interest  income,  or the
difference  between  interest  income on earning assets and interest  expense in
interest-bearing liabilities. Net interest income (FTE) during the first quarter
of  2006  increased   $2,712,000  (14.5%)  from  the  same  period  in  2005  to
$21,468,000. The increase in net interest income (FTE) was due to a $182,749,000
(12.5%) increase in average balances of earning assets to  $1,646,777,000  and a
0.09% increase in net interest margin (FTE) to 5.21%.

Interest and Fee Income
Interest and fee income (FTE) for the first quarter of 2006 increased $5,364,000
(23.4%) from the first quarter of 2005. The increase was due to the $182,749,000
(12.5%) increase in average  interest-earning assets and a 0.61% increase in the
yield on those average earning assets to 6.86%.  The growth in  interest-earning
assets  was the  result of a  $217,502,000  (18.6%)  increase  in  average  loan
balances to $1,384,541,000  that was offset by a $34,813,000 (11.7%) decrease in
average balance of investments to $261,568,000.

Contributing to the 0.61% increase in average yield on  interest-earning  assets
was a 0.55%  increase in average  yield on loans to 7.24% in the  quarter  ended
March 31, 2006 compared to 6.69% in the year-ago quarter. This 0.55% increase in
average  yield on loans is  primarily  the  result of  increases  in  short-term
lending rates including the prime rate of lending which increased  steadily from
5.25% at December 31, 2004 to 7.75% at March 31, 2006.  The average yield on the
Company's combined taxable and nontaxable investment balances increased 0.32% to
4.84% in the  quarter  ended March 31,  2006  compared to 4.52% in the  year-ago
quarter.  The increase in the average yield on investment balances was primarily
due to maturity of lower yielding fixed rate mortgage backed securities.



                                      -20-



Interest Expense
Interest  expense  increased  $2,652,000  (64.4%)  in the first  quarter of 2006
compared to the year-ago  quarter.  The increase was due to a 0.68%  increase in
the average rate paid on  interest-bearing  liabilities  from 1.43% in the first
quarter of 2005 to 2.11% in the first quarter of 2006.

The  average  balance of  interest-bearing  liabilities  increased  $134,721,000
(11.7%) in the first  quarter of 2006  compared  to the  year-ago  quarter.  The
average balance of interest-bearing  demand deposits, time deposits, and Federal
funds purchased were up $8,184,000 (3.4%), $133,541,000 (40.4%), and $39,357,000
(138%),  respectively,  from the  year-ago  quarter.  In  addition,  the average
balance of  noninterest-bearing  deposits increased $44,291,000 (14.2%) from the
year-ago  quarter.  The average balance of savings deposits was down $50,255,000
(10.4%) from the year-ago quarter.  The average rates paid for all categories of
interest-bearing  liabilities except  interest-bearing demand deposits and other
borrowings  were up due to increases in market  rates.  The average rate paid on
savings   deposits,   time  deposits,   federal  funds  purchased,   and  junior
subordinated debt increased 0.02%,  0.93%,  2.01%, and 1.90%,  respectively,  to
0.74%,  3.47%,  4.42%,  and  7.11%,  respectively.  The  average  rate  paid  on
interest-bearing  demand  deposits was unchanged at 0.20% while the average rate
paid on other  borrowings  decreased  0.30%  basis  points  to 4.35%  due to the
addition of short-term other  borrowings at significantly  lower rates than what
previously existed in that category.

Net Interest Margin (FTE)
The  following  table  summarizes  the  components of the Company's net interest
margin for the periods indicated:
                                             Three months ended
                                                  March 31,
                                           ----------------------
                                             2006          2005
                                           ----------------------
Yield on earning assets                      6.86%         6.25%
Rate paid on interest-bearing
     liabilities                             2.11%         1.42%
                                           ----------------------
     Net interest spread                     4.75%         4.82%
Impact of all other net
     noninterest-bearing funds               0.46%         0.30%
                                           ----------------------
        Net interest margin                  5.21%         5.12%
                                           ======================

Net interest margin in the first quarter of 2006 increased 0.09% compared to the
first quarter of 2005.  This increase in net interest margin was mainly due to a
larger favorable impact of all other net noninterest-bearing  funds, principally
noninterest-bearing  demand deposits,  offset by a slightly reduced net interest
spread when compared to the year-ago quarter.


                                      -21-



Summary of Average Balances, Yields/Rates and Interest Differential
The following table presents,  for the periods indicated,  information regarding
the Company's consolidated average assets, liabilities and shareholders' equity,
the amounts of interest income from average earning assets and resulting yields,
and the amount of interest expense paid on interest-bearing liabilities. Average
loan balances include  nonperforming  loans.  Interest income includes  proceeds
from  loans on  nonaccrual  loans  only to the extent  cash  payments  have been
received and applied to interest income.  Yields on securities and certain loans
have been adjusted  upward to reflect the effect of income  thereon  exempt from
federal  income  taxation  at  the  current   statutory  tax  rate  (dollars  in
thousands).




                                                          For the three months ended
                                       ----------------------------------------------------------------
                                                March 31, 2006                  March 31, 2005
                                       -----------------------------   --------------------------------
                                                   Interest    Rates               Interest    Rates
                                         Average   Income/    Earned     Average   Income/    Earned
                                         Balance   Expense     Paid      Balance   Expense     Paid
                                       -----------------------------   --------------------------------
                                                                              
Assets:
Loans                                  $1,384,541  $25,069    7.24%     $1,167,039 $19,527     6.69%
Investment securities - taxable           226,164    2,440    4.32%        264,015   2,690     4.08%
Investment securities - nontaxable         35,403      725    8.20%         32,366     656     8.11%
Federal funds sold                            669        7    4.19%            608       4     2.63%
                                       -----------------------------   --------------------------------
   Total earning assets                 1,646,777   28,241    6.86%      1,464,028  22,877     6.25%
Other assets                              175,664                          164,799
                                       -----------                     ------------
Total assets                           $1,822,441                       $1,628,827

Liabilities and shareholders' equity:
Interest-bearing demand deposits         $247,466      122    0.20%       $239,282     121     0.20%
Savings deposits                          432,206      797    0.74%        482,461     870     0.72%
Time deposits                             463,884    4,023    3.47%        330,343   2,094     2.54%
Federal funds purchased                    67,926      750    4.42%         28,569     172     2.41%
Other borrowings                           32,006      348    4.35%         28,112     327     4.65%
Junior subordinated debt                   41,238      733    7.11%         41,238     537     5.21%
                                       -----------------------------   --------------------------------
   Total interest-bearing liabilities   1,284,726    6,773    2.11%      1,150,005   4,121     1.43%
Noninterest-bearing deposits              355,269                          310,978
Other liabilities                          28,036                           26,580
Shareholders' equity                      154,410                          141,264
                                       -----------                     ------------
Total liabilities and shareholders'
  equity                               $1,822,441                       $1,628,827
                                       ===========                     ============
Net interest spread(1)                                        4.75%                            4.82%
Net interest income and interest margin(2)         $21,468    5.21%                $18,756     5.12%
                                                  ==================               ==================



(1)  Net interest spread represents the average yield earned on assets minus the
     average rate paid on interest-bearing liabilities.
(2)  Net  interest  margin is computed by  calculating  the  difference  between
     interest  income and  expense,  divided by the  average  balance of earning
     assets.

                                      -22-



Summary of  Changes in  Interest  Income and  Expense  due to Changes in Average
Asset and Liability Balances and Yields Earned and Rates Paid

The following  table sets forth a summary of the changes in interest  income and
interest expense from changes in average asset and liability  balances  (volume)
and changes in average  interest  rates for the periods  indicated.  Changes not
solely  attributable to volume or rates have been allocated in proportion to the
respective volume and rate components (dollars in thousands).

                                             Three months ended March 31, 2006
                                                compared with three months
                                                   ended March 31, 2005
                                             ---------------------------------
                                              Volume       Rate       Total
                                             ---------------------------------
Increase (decrease) in interest income:
Loans                                         $3,638      $1,904     $5,542
Investment securities                           (393)        212       (181)
Federal funds sold                                 -           3          3
                                             ---------------------------------
   Total earning assets                        3,245       2,119      5,364
                                             ---------------------------------
Increase (decrease) in interest expense:
Interest-bearing demand deposits                   4          (3)         1
Savings deposits                                 (90)         17        (73)
Time deposits                                    848       1,081      1,929
Federal funds purchased                          237         341        578
Other borrowings                                  45         (24)        21
Junior subordinated debt                           -         196        196
                                             ---------------------------------
   Total interest-bearing liabilities          1,044       1,608      2,652
                                             ---------------------------------
Increase (decrease) in Net Interest Income    $2,201        $511     $2,712
                                             =================================

Provision for Loan Losses
The  Company  provided  $500,000  for loan  losses in the first  quarter of 2006
versus $100,000 in the first quarter of 2005.  During the first quarter of 2006,
the Company recorded $82,000 of net loan charge-offs  versus $62,000 of net loan
charge-offs in the year-ago quarter.

Noninterest Income
The following  table  summarizes the  components of  noninterest  income for the
periods indicated (dollars in thousands).

                                              Three months ended March 31,
                                              ----------------------------
                                                   2006           2005
                                              ----------------------------
     Service charges on deposit accounts          $3,474         $3,034
     ATM fees and interchange                        818            712
     Other service fees                              515            484
     Amortization of mortgage servicing rights         -           (168)
     Change in value of mortgage servicing rights     50             -
     Gain on sale of loans                           298            292
     Commissions on sale of
       nondeposit investment products                558            532
     Increase in cash value of life insurance        400            220
     Other noninterest income                        335            221
                                              ----------------------------
     Total noninterest income                     $6,448         $5,327
                                              ============================

Noninterest  income for the first quarter of 2006 increased  $1,121,000  (21.0%)
from the year-ago quarter.  The increase in noninterest income from the year-ago
quarter  was mainly due to a $440,000  (14.5%)  increase  in service  charges on
deposit accounts to $3,474,000,  a $180,000 (81.8%) gain in the increase in cash
value of life insurance,  and a $218,000 increase related to the change in value
of  mortgage  servicing  rights.  The  increase  in  service  charges on deposit
accounts was primarily due to the introduction of a business overdraft privilege
product in March 2005 and growth in customer count.  The gain in the increase in
cash value of life  insurance  was due to higher  earning  rates on the  related
insurance  policies.  The  increased  related to the change in value of mortgage
servicing  rights is due to the adoption of market value accounting for mortgage
servicing  rights  effective  January 1, 2006 and the  related  change in market
value from January 1, 2006 to March 31, 2006.

                                      -23-



Noninterest Expense
The following  table  summarizes the  components of noninterest  expense for the
periods indicated (dollars in thousands).

                                              Three months ended March 31,
                                              ----------------------------
                                                   2006           2005
                                              ----------------------------
     Salaries & benefits                          $9,156         $8,369
     Equipment                                     1,145            993
     Occupancy                                     1,022            980
     Advertising and marketing                       440            342
     ATM network charges                             434            371
     Data processing and software                    412            374
     Professional fees                               380            407
     Telecommunications                              370            384
     Intangible amortization                         346            343
     Courier service                                 297            278
     Postage                                         244            237
     Assessments                                      80             76
     Operational losses                               44             26
     Other                                         2,052          1,933
                                              ----------------------------
     Total                                       $16,422        $15,113
                                              ============================
     Average full time equivalent staff              607            565
     Noninterest expense to revenue (FTE)         58.83%         62.75%

Noninterest  expense for the first quarter of 2006 increased  $1,309,000  (8.7%)
compared to the first quarter of 2005.  Salaries and benefits expense  increased
$787,000 (9.4%) to $9,156,000. The increase in salaries and benefits expense was
mainly  due to annual  salary  increases,  and new  employees  at the  Company's
recently opened branches in Lincoln (February 2005),  Folsom-East Bidwell (March
2005),  Roseville-Pleasant Grove (November 2005), Yuba City-Marketplace (January
2006),  and  Folsom-Empire  Ranch (March 2006).  Other categories of noninterest
expense  such as  equipment,  occupancy,  ATM  network  charges,  and other also
increased,  in  part,  due to  these  newly  opened  branches.  Advertising  and
marketing expense increased $98,000 (28.7%) to $440,000.

Provision for Income Tax
The  effective  tax rate for the three months ended March 31, 2006 was 39.1% and
reflects a decrease  from 39.3% for the three months  ended March 31, 2005.  The
provision for income taxes for all periods  presented is primarily  attributable
to the respective  level of earnings and the incidence of allowable  deductions,
particularly from increase in cash value of life insurance, tax-exempt loans and
state and municipal securities.


                                      -24-



Classified Assets
The  Company  closely  monitors  the  markets in which it  conducts  its lending
operations  and  continues  its strategy to control  exposure to loans with high
credit risk.  Asset reviews are performed  using grading  standards and criteria
similar to those employed by bank regulatory  agencies.  Assets receiving lesser
grades  fall  under  the  "classified  assets"  category,   which  includes  all
nonperforming  assets and potential problem loans, and receive an elevated level
of attention to ensure collection.

The following is a summary of classified assets on the dates indicated  (dollars
in thousands):

                               At March 31, 2006           At December 31, 2005
                           -------------------------    ------------------------
                             Gross Guaranteed  Net       Gross Guaranteed   Net
                           -----------------------------------------------------
Classified loans           $13,936   $7,257  $6,679    $13,086   $7,110   $5,976
Other classified assets          -        -       -          -        -        -
                           -----------------------------------------------------
Total classified assets    $13,936   $7,257  $6,679    $13,086   $7,110   $5,976
                           =====================================================
Allowance for loan losses/classified loans   249.2%                       271.5%

Classified  assets,  net of  guarantees  of the U.S.  Government,  including its
agencies and its  government-sponsored  agencies  increased  $703,000 (11.8%) to
$6,679,000 at March 31, 2006 from $5,976,000 at December 31, 2005.

Nonperforming Loans
Loans are reviewed on an  individual  basis for  reclassification  to nonaccrual
status when any one of the following  occurs:  the loan becomes 90 days past due
as to  interest  or  principal,  the full and timely  collection  of  additional
interest or principal becomes  uncertain,  the loan is classified as doubtful by
internal credit review or bank regulatory  agencies,  a portion of the principal
balance has been charged off, or the Company takes possession of the collateral.
Loans that are placed on nonaccrual even though the borrowers  continue to repay
the  loans as  scheduled  are  classified  as  "performing  nonaccrual"  and are
included  in  total  nonperforming  loans.  The  reclassification  of  loans  as
nonaccrual does not necessarily reflect Management's judgment as to whether they
are collectible.

Interest income is not accrued on loans where Management has determined that the
borrowers  will  be  unable  to  meet  contractual   principal  and/or  interest
obligations,  unless the loan is well secured and in the process of  collection.
When a loan is placed on nonaccrual,  any previously accrued but unpaid interest
is  reversed.  Income on such loans is then  recognized  only to the extent that
cash is received  and where the future  collection  of  principal  is  probable.
Interest  accruals  are resumed on such loans only when they are  brought  fully
current  with  respect to interest and  principal  and when,  in the judgment of
Management, the loans are estimated to be fully collectible as to both principal
and interest.

Interest income on nonaccrual loans, which would have been recognized during the
three  months  ended  March 31,  2006,  if all such  loans had been  current  in
accordance with their original terms, totaled $357,000. Interest income actually
recognized  on these  loans  during the three  months  ended  March 31, 2006 was
$249,000.

The  Company's  policy is to place loans 90 days or more past due on  nonaccrual
status.  In some instances  when a loan is 90 days past due Management  does not
place  it on  nonaccrual  status  because  the loan is well  secured  and in the
process of  collection.  A loan is considered to be in the process of collection
if, based on a probable  specific  event,  it is expected  that the loan will be
repaid or brought current. Generally, this collection period would not exceed 30
days. Loans where the collateral has been repossessed are classified as OREO or,
if the collateral is personal  property,  the loan is classified as other assets
on the Company's financial statements.

                                      -25-



Management considers both the adequacy of the collateral and the other resources
of the  borrower  in  determining  the steps to be taken to  collect  nonaccrual
loans.   Alternatives  that  are  considered  are  foreclosure,   collecting  on
guarantees, restructuring the loan or collection lawsuits.

As shown in the following table, total nonperforming assets net of guarantees of
the  U.S.  Government,  including  its  agencies  and  its  government-sponsored
agencies,  increased  $1,087,000  (36.7%) to  $4,048,000  during the first three
months of 2006.  Nonperforming assets net of guarantees represent 0.22% of total
assets.  All nonaccrual loans are considered to be impaired when determining the
need  for a  specific  valuation  allowance.  The  Company  continues  to make a
concerted  effort to work problem and potential  problem loans to reduce risk of
loss.




 (dollars in thousands):
                                                  At March 31, 2006           At December 31, 2005
                                              -------------------------    -------------------------
                                                Gross Guaranteed  Net       Gross Guaranteed   Net
                                              ------------------------------------------------------
                                                                             
Performing nonaccrual loans                    $9,871   $6,826   $3,045     $9,315  $6,933   $2,382
Nonperforming, nonaccrual loans                 1,286      283    1,003        579       -      579
                                              ------------------------------------------------------
     Total nonaccrual loans                    11,157    7,109    4,048      9,894   6,933    2,961
Loans 90 days past due and still accruing           -        -        -          -       -        -
                                              ------------------------------------------------------
Total nonperforming loans                      11,157    7,109    4,048      9,894   6,933    2,961
Other real estate owned                             -        -        -          -       -        -
                                              ------------------------------------------------------
Total nonperforming assets                    $11,157   $7,109   $4,048     $9,894  $6,933   $2,961
                                              ======================================================
Nonperforming loans to total loans                                0.29%                       0.21%
Nonperforming assets to total assets                              0.22%                       0.16%
Allowance for loan losses to nonperforming loans                   411%                        548%



Capital Resources
The  current  and  projected  capital  position of the Company and the impact of
capital plans and long-term strategies are reviewed regularly by Management.

On March 11, 2004,  the Board of  Directors  approved an increase in the maximum
number of shares to be repurchased  under the Company's  stock  repurchase  plan
originally announced on July 31, 2003 from 250,000 to 500,000 effective on April
9, 2004,  solely to conform with the two-for-one  stock split effective on April
9, 2004. The 250,000 shares originally authorized for repurchase under this plan
represented  approximately 3.2% of the Company's  approximately 7,852,000 common
shares  outstanding as of July 31, 2003. This plan has no stated expiration date
for the  repurchases,  which  may occur  from time to time as market  conditions
allow.  As of March 31, 2006, the Company had  repurchased  374,371 shares under
this plan as adjusted for the 2-for-1 stock split paid on April 30, 2004,  which
left 125,629 shares available for repurchase under the plan.

The  Company's  primary  capital  resource is  shareholders'  equity,  which was
$152,797,000 at March 31, 2006. This amount represents an increase of $3,304,000
from December 31, 2005, the net result of comprehensive income for the period of
$5,030,000,  the issuance of common  shares via the exercise of stock options of
$841,000,  and the effect of stock option vesting of $139,000,  partially offset
by the retirement of common stock with value of $815,000  tendered by employees,
in lieu of cash, to exercise  stock  options,  and dividends paid of $1,891,000.
The Company's ratio of equity to total assets was 8.35%,  8.43%, and 8.12% as of
March 31, 2006, March 31, 2005, and December 31, 2005, respectively.

                                      -26-



The following  summarizes the ratios of capital to risk-adjusted  assets for the
periods indicated:

                                At March 31,         At            Minimum
                            -----------------    December 31,    Regulatory
                             2006       2005        2005         Requirement
                            ------------------------------------------------
     Tier I Capital         10.04%     10.81%       9.76%            4.00%
     Total Capital          11.09%     11.91%      10.79%            8.00%
     Leverage ratio          9.82%      9.95%       9.72%            4.00%

Off-Balance Sheet Items
The Bank has certain  ongoing  commitments  under  operating and capital leases.
These commitments do not significantly impact operating results. As of March 31,
2006 commitments to extend credit and commitments  related to the Bank's deposit
overdraft  privilege  product were the Bank's only  financial  instruments  with
off-balance  sheet  risk.  The  Bank has not  entered  into  any  contracts  for
financial  derivative   instruments  such  as  futures,   swaps,  options,  etc.
Commitments to extend credit were  $606,542,000  and  $626,490,000  at March 31,
2006 and December 31, 2005, respectively, and represent 43.3% of the total loans
outstanding  at March 31, 2006 versus 45.2% at December  31,  2005.  Commitments
related to the Bank's deposit overdraft  privilege  product totaled  $35,890,000
and $35,002,000 at March 31, 2006 and December 31, 2005, respectively.

Certain Contractual Obligations
The following chart summarizes certain contractual obligations of the Company as
of December 31, 2005:




                                                              Less than        1-3          3-5       More than
(dollars in thousands)                             Total      one year        years        years       5 years
                                                ------------------------------------------------------------------
                                                                                           
Federal funds purchased                            $96,800     $96,800            -            -            -
FHLB loan, fixed rate of 5.41%
   payable on April 7, 2008, callable
   in its entirety by FHLB on a quarterly
   basis beginning April 7, 2003                    20,000           -       20,000            -            -
FHLB loan, fixed rate of 5.35%
   payable on December 9, 2008                       1,500           -        1,500            -            -
FHLB loan, fixed rate of 5.77%
   payable on February 23, 2009                      1,000           -            -        1,000            -
Capital lease obligation on premises,
   effective rate of 13% payable
   monthly in varying amounts
   through December 1, 2009                            293           -            -          293            -
Other collateralized borrowings,
   fixed rate of  1.44% payable on January 3, 2006   8,597       8,597            -            -            -
Junior subordinated debt, adjustable rate
   of three-month LIBOR plus 3.05%,
   callable in whole or in part by the
   Company on a quarterly basis beginning
   October 7, 2008, matures October 7, 2033         20,619           -            -            -       20,619
Junior subordinated debt, adjustable rate
   of three-month LIBOR plus 2.55%,
   callable in whole or in part by the
   Company on a quarterly basis beginning
   July 23, 2009, matures July 23, 2034             20,619           -            -            -       20,619
Operating lease obligations                          7,095       1,522        2,600        1,888        1,085
Deferred compensation(1)                             1,464         264          481          454          265
Supplemental retirement plans(1)                     4,528         477          938          926        2,187
Employment agreements                                  119         119            -            -            -
                                                ------------------------------------------------------------------
Total contractual obligations                     $182,634    $107,779      $25,519       $4,561      $44,775
                                                ==================================================================



(1)  These amounts  represent known certain  payments to participants  under the
     Company's  deferred  compensation  and supplemental  retirement  plans. See
     "Retirement  Plans"  at  Part  I,  Item 1 of  this  report  for  additional
     information related to the Company's deferred compensation and supplemental
     retirement plan liabilities.

                                      -27-



Item 3.  Quantitative and Qualitative Disclosures about Market Risk

Asset and Liability Management
The goal for managing the assets and  liabilities  of the Company is to maximize
shareholder  value and earnings while  maintaining a high quality  balance sheet
without exposing the Company to undue interest rate risk. The Board of Directors
has overall  responsibility  for the  Company's  interest  rate risk  management
policies.  The Company has an Asset and Liability  Management  Committee  (ALCO)
which establishes and monitors guidelines to control the sensitivity of earnings
to changes in interest rates.

Activities involved in asset/liability management include but are not limited to
lending,  accepting and placing  deposits,  investing in securities  and issuing
debt.   Interest  rate  risk  is  the  primary  market  risk   associated   with
asset/liability  management.  Sensitivity  of earnings to interest  rate changes
arises when yields on assets change in a different time period or in a different
amount from that of interest  costs on  liabilities.  To mitigate  interest rate
risk, the structure of the balance sheet is managed with the goal that movements
of interest  rates on assets and  liabilities  are  correlated and contribute to
earnings  even in  periods  of  volatile  interest  rates.  The  asset/liability
management  policy  sets  limits on the  acceptable  amount of  variance  in net
interest margin,  net income and market value of equity under changing  interest
environments.  Market value of equity is the net present value of estimated cash
flows from the Company's  assets,  liabilities and off-balance  sheet items. The
Company uses simulation  models to forecast net interest margin,  net income and
market value of equity.

Simulation of net interest  margin,  net income and market value of equity under
various  interest  rate  scenarios is the primary tool used to measure  interest
rate risk. Using computer-modeling  techniques,  the Company is able to estimate
the potential  impact of changing  interest  rates on net interest  margin,  net
income and market value of equity.  A balance sheet  forecast is prepared  using
inputs  of  actual  loan,   securities  and  interest-bearing   liability  (i.e.
deposits/borrowings) positions as the beginning base.

In the simulation of net interest  margin and net income under various  interest
rate scenarios,  the forecast balance sheet is processed  against seven interest
rate  scenarios.  These  seven  interest  rate  scenarios  include  a flat  rate
scenario,  which assumes  interest  rates are  unchanged in the future,  and six
additional rate ramp scenarios ranging from +300 to -300 basis points around the
flat scenario in 100 basis point  increments.  These ramp scenarios  assume that
interest  rates  increase  or  decrease  evenly  (in a  "ramp"  fashion)  over a
twelve-month period and remain at the new levels beyond twelve months.

In the  simulation  of  market  value of  equity  under  various  interest  rate
scenarios,  the forecast balance sheet is processed  against seven interest rate
scenarios.  These seven interest rate  scenarios  include the flat rate scenario
described  above,  and six additional rate shock scenarios  ranging from +300 to
-300 basis points around the flat scenario in 100 basis point increments.  These
rate shock scenarios assume that interest rates increase or decrease immediately
(in a "shock" fashion) and remain at the new level in the future.

At March 31, 2006,  the results of the  simulations  noted above  indicate  that
given a "flat"  balance  sheet  scenario,  and if deposit  rates  track  general
interest  rate changes by  approximately  50%, the  Company's  balance  sheet is
slightly  liability  sensitive.  "Liability  sensitive"  implies  that  earnings
decrease when interest rates rise,  and increase when interest  rates  decrease.
The  magnitude of all the  simulation  results  noted above is within the Bank's
policy guidelines. The asset liability management policy limits aggregate market
risk, as measured in this fashion,  to an acceptable level within the context of
risk-return trade-offs.

The simulation  results noted above do not incorporate  any management  actions,
which might  moderate the negative  consequences  of interest  rate  deviations.
Therefore,  they do not reflect likely actual results, but serve as conservative
estimates of interest rate risk.

At March 31, 2006 and 2005, the Company had no derivative financial instruments.

                                      -28-



Liquidity
The  Company's  principal  source of asset  liquidity is federal  funds sold and
marketable  investment securities available for sale. At March 31, 2006, federal
funds sold and investment  securities  available for sale totaled  $244,441,000,
representing  a decrease of  $18,214,000  (6.9%) from  December 31, 2005,  and a
decrease of  $49,470,000  (16.8%) from March 31, 2005. In addition,  the Company
generates  additional  liquidity  from its operating  activities.  The Company's
profitability  during the first three months of 2006  generated  cash flows from
operations of $10,833,000  compared to $7,446,000  during the first three months
of  2005.  Additional  cash  flows  may be  provided  by  financing  activities,
primarily  the  acceptance  of deposits  and  borrowings  from banks.  Sales and
maturities of investment  securities produced cash inflows of $13,894,000 during
the three  months  ended March 31, 2005  compared to  $14,244,000  for the three
months ended March 31, 2005.  During the three months ended March 31, 2006,  the
Company  invested  $985,000 and  $15,155,000  in securities and net loan growth,
respectively,  compared to $25,525,000 and $9,528,000 invested in securities and
net loan  growth,  respectively,  during the first three  months of 2005.  These
changes  in  investment  and loan  balances  contributed  to net  cash  used for
investing activities of $2,860,000 during the three months ended March 31, 2006,
compared to net cash used for  investing  activities of  $22,317,000  during the
three  months  ended  March  31,  2005.  Financing  activities  used net cash of
$22,220,000  during the three months ended March 31, 2006,  compared to net cash
provided by financing  activities of  $22,380,000  during the three months ended
March 31, 2005. Deposit balance increases accounted for $30,594,000 of financing
sources of funds  during the three  months  ended  March 31,  2006,  compared to
$49,916,000  during the three months ended March 31, 2005.  Dividends  paid used
$1,891,000  and  $1,732,000 of cash during the three months ended March 31, 2006
and 2005,  respectively.  Decreases in Federal funds purchased used  $51,000,000
and $25,700,000 of cash, respectively,  during the quarters ended March 31, 2006
and 2005, respectively.  Also, the Company's liquidity is dependent on dividends
received  from  the  Bank.  Dividends  from  the Bank  are  subject  to  certain
regulatory restrictions.

Item 4.  Controls and Procedures
The Chief Executive  Officer,  Richard Smith,  and the Chief Financial  Officer,
Thomas Reddish, evaluated the effectiveness of the Company's disclosure controls
and  procedures  as of  March  31,  2006  ("Evaluation  Date").  Based  on  that
evaluation,  they  concluded  that  as of  the  Evaluation  Date  the  Company's
disclosure  controls and procedures are effective to allow timely  communication
to them of  information  relating  to the  Company  and the Bank  required to be
disclosed in its filings with the  Securities  and Exchange  Commission  ("SEC")
under  the  Securities  Exchange  Act of  1934,  as  amended  ("Exchange  Act").
Disclosure  controls and  procedures are Company  controls and other  procedures
that are  designed to ensure that  information  required to be  disclosed by the
Company  in the  reports  that it files  under  the  Exchange  Act is  recorded,
processed,  summarized  and reported  within the time  periods  specified in the
SEC's rules and forms.

No changes in the Company's  internal control over financial  reporting occurred
during  the  first  quarter  of  2006  that  have  materially  affected,  or are
reasonably  likely to materially  affect,  the Company's  internal  control over
financial reporting.



                                      -29-



PART II - OTHER INFORMATION

Item 1 - Legal Proceedings

Due to the nature of the banking business, the Bank is at times party to various
legal actions;  all such actions are of a routine nature and arise in the normal
course of business of the Bank.

Item 1A - Risk Factors

There have been no material changes to the risk factors previously  disclosed in
Item 1A to Part I of our Annual Report on Form 10-K for the year ended  December
31, 2005.

Item 2 - Unregistered Sales of Equity Securities and Use of Proceeds

The following table shows information concerning the common stock repurchased by
the Company  during the first quarter of 2006  pursuant to the  Company's  stock
repurchase plan  originally  announced on July 31, 2003, as amended on March 11,
2004, to conform with the Company's  two-for-one  stock split effective on April
9, 2004,  which is discussed in more detail under  "Capital  Resources"  in this
report:




Period          (a) Total number    (b) Average price   (c) Total number of     (d) Maximum number
                of Shares purchased  paid per share     shares purchased as     of shares that may yet
                                                        part of publicly        be purchased under the
                                                        announced plans or      plans or programs
                                                        programs
-----------------------------------------------------------------------------------------------------------
                                                                           
Jan. 1-31, 2006             -              -                        -                 125,629
Feb. 1-28, 2006             -              -                        -                 125,629
Mar. 1-31, 2006             -              -                        -                 125,629
-----------------------------------------------------------------------------------------------------------
Total                       -              -                        -                 125,629



During the quarter ended March 31, 2006, Employees tendered 30,125 shares of the
Company's  common stock with an average market value of $27.05 per share in lieu
of cash to exercise options as permitted by the Company's  shareholder  approved
stock  option  plans.  The  tendered  shares were  retired.  The market value of
tendered  shares is the last market  trade price at closing on the day of option
exercise.

Item 6 - Exhibits

     3.1*      Restated  Articles of  Incorporation  dated May 9, 2003, filed as
               Exhibit  3.1 to  TriCo's  Quarterly  Report  on Form 10-Q for the
               quarter ended March 31, 2003.

     3.2*      Bylaws of TriCo Bancshares,  as amended,  filed as Exhibit 3.2 to
               TriCo's Form S-4  Registration  Statement  dated January 16, 2003
               (No. 333-102546).

     4*        Certificate of  Determination  of Preferences of Series AA Junior
               Participating  Preferred  Stock  filed as Exhibit  3.3 to TriCo's
               Quarterly Report on Form 10-Q for the quarter ended September 30,
               2001.

     10.1*     Rights  Agreement  dated June 25, 2001,  between TriCo and Mellon
               Investor  Services  LLC filed as  Exhibit 1 to  TriCo's  Form 8-A
               dated July 25, 2001.

     10.2*     Form of Change of Control Agreement dated July 20, 2004,  between
               TriCo  and each of Craig  Carney,  Gary  Coelho,  W.R.  Hagstrom,
               Andrew  Mastorakis,  Rick  Miller,  Richard  O'Sullivan,   Thomas
               Reddish,  and Ray Rios filed as Exhibit 10.2 to TriCo's Quarterly
               Report on Form 10-Q for the quarter ended June 30, 2004.

                                      -30-



     10.3*     TriCo's 1993 Non-Qualified Stock Option Plan filed as Exhibit 4.1
               to TriCo's Form S-8 Registration Statement dated January 18, 1995
               (No. 33-88704).

     10.4*     TriCo's  Non-Qualified  Stock Option Plan filed as Exhibit 4.2 to
               TriCo's Form S-8  Registration  Statement  dated January 18, 1995
               (No. 33-88704).

     10.5*     TriCo's  Incentive  Stock  Option  Plan filed as  Exhibit  4.3 to
               TriCo's Form S-8  Registration  Statement  dated January 18, 1995
               (No. 33-88704).

     10.6*     TriCo's 1995 Incentive  Stock Option Plan filed as Exhibit 4.1 to
               TriCo's  Form S-8  Registration  Statement  dated August 23, 1995
               (No. 33-62063).

     10.7*     TriCo's 2001 Stock  Option Plan as amended  filed as Exhibit 10.7
               to TriCo's Annual Report on Form 10-K for the year ended December
               31, 2004.

     10.8*     Employment  Agreement between TriCo and Richard Smith dated April
               20,  2004 filed as Exhibit  10.8 to TriCo's  Quarterly  Report on
               Form 10-Q for the quarter ended June 30, 2004.

     10.9*     Tri Counties  Bank  Executive  Deferred  Compensation  Plan dated
               September  1, 1987,  as restated  April 1, 1992,  and amended and
               restated effective as of January 1, 2004 filed as Exhibit 10.9 to
               TriCo's  Quarterly Report on Form 10-Q for the quarter ended June
               30, 2004.

     10.10*    Tri  Counties  Bank  Deferred  Compensation  Plan  for  Directors
               effective April 1, 1992, as amended and restated  effective as of
               January  1, 2004  filed as  Exhibit  10.10 to  TriCo's  Quarterly
               Report on Form 10-Q for the quarter ended June 30, 2004.

     10.11*    Amendments to Tri Counties Bank Executive  Deferred  Compensation
               Plan referenced at Exhibit 10.9,  effective as of January 1, 2005
               filed as Exhibit 10.11 to TriCo's  Annual Report on Form 10-K for
               the year ended December 31, 2004.

     10.12*    Amendments to Tri Counties Bank  Deferred  Compensation  Plan for
               Directors referenced at Exhibit 10.10, effective as of January 1,
               2005 filed as Exhibit 10.12 to TriCo's Annual Report on Form 10-K
               for the year ended December 31, 2004.

     10.13*    Tri Counties  Bank  Supplemental  Retirement  Plan for  Directors
               dated September 1, 1987, as restated January 1, 2001, and amended
               and  restated  January 1, 2004 filed as Exhibit  10.12 to TriCo's
               Quarterly  Report on Form  10-Q for the  quarter  ended  June 30,
               2004.

     10.14*    2004 TriCo Bancshares  Supplemental Retirement Plan for Directors
               effective  January  1, 2004  filed as  Exhibit  10.13 to  TriCo's
               Quarterly  Report on Form  10-Q for the  quarter  ended  June 30,
               2004.

     10.15*    Tri  Counties  Bank   Supplemental   Executive   Retirement  Plan
               effective  September 1, 1987, as amended and restated  January 1,
               2004 filed as Exhibit 10.14 to TriCo's  Quarterly  Report on Form
               10-Q for the quarter ended June 30, 2004.

                                      -31-



     10.16*    2004 TriCo  Bancshares  Supplemental  Executive  Retirement  Plan
               effective  January  1, 2004  filed as  Exhibit  10.15 to  TriCo's
               Quarterly  Report on Form  10-Q for the  quarter  ended  June 30,
               2004.

     10.17*    Form of Joint  Beneficiary  Agreement  effective  March 31,  2003
               between Tri Counties  Bank and each of George  Barstow,  Dan Bay,
               Ron Bee, Craig Carney,  Robert Elmore, Greg Gill, Richard Miller,
               Andrew Mastorakis,  Richard  O'Sullivan,  Thomas Reddish,  Jerald
               Sax,  and  Richard  Smith,  filed as  Exhibit  10.14  to  TriCo's
               Quarterly Report on Form 10-Q for the quarter ended September 30,
               2003.

     10.18*    Form of Joint  Beneficiary  Agreement  effective  March 31,  2003
               between Tri Counties Bank and each of Don Amaral,  William Casey,
               Craig Compton, John Hasbrook,  Michael Koehnen, Wendell Lundberg,
               Donald Murphy,  Carroll  Taresh,  and Alex  Vereshagin,  filed as
               Exhibit  10.15 to TriCo's  Quarterly  Report on Form 10-Q for the
               quarter ended September 30, 2003.

     10.19*    Form of  Tri-Counties  Bank  Executive  Long Term Care  Agreement
               effective  June 10, 2003  between Tri  Counties  Bank and each of
               Craig  Carney,   Andrew  Mastorakis,   Richard  Miller,   Richard
               O'Sullivan, and Thomas Reddish, filed as Exhibit 10.16 to TriCo's
               Quarterly Report on Form 10-Q for the quarter ended September 30,
               2003.

     10.20*    Form of  Tri-Counties  Bank  Director  Long Term  Care  Agreement
               effective June 10, 2003 between Tri Counties Bank and each of Don
               Amaral,  William  Casey,  Craig Compton,  John Hasbrook,  Michael
               Koehnen,  Donald Murphy,  Carroll Taresh,  and Alex  Verischagin,
               filed as Exhibit 10.17 to TriCo's  Quarterly  Report on Form 10-Q
               for the quarter ended September 30, 2003.

     10.21*    Form of  Indemnification  Agreement between TriCo  Bancshares/Tri
               Counties Bank and each of the  directors of TriCo  Bancshares/Tri
               Counties  Bank  effective on the date that each director is first
               elected,  filed as Exhibit 10.18 to TriCo'S Annual Report on Form
               10-K for the year ended December 31, 2003.

     10.22*    Form of  Indemnification  Agreement between TriCo  Bancshares/Tri
               Counties Bank and each of Craig  Carney,  W.R.  Hagstrom,  Andrew
               Mastorakis, Rick Miller, Richard O'Sullivan,  Thomas Reddish, Ray
               Rios,  and  Richard  Smith  filed as  Exhibit  10.21  to  TriCo's
               Quarterly  Report on Form  10-Q for the  quarter  ended  June 30,
               2004.

     21.1      Tri  Counties  Bank,  a  California  banking  corporation,  TriCo
               Capital  Trust I, a Delaware  business  trust,  and TriCo Capital
               Trust II, a Delaware business trust, are the only subsidiaries of
               Registrant

     31.1      Rule 13a-14(a)/15d-14(a) Certification of CEO

     31.2      Rule 13a-14(a)/15d-14(a) Certification of CFO

     32.1      Section 1350 Certification of CEO

     32.2      Section 1350 Certification of CFO

       * Previously filed and incorporated by reference.

                                      -32-



SIGNATURES
Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                     TRICO BANCSHARES
                                       (Registrant)

Date:  May 2, 2005                   /s/ Thomas J. Reddish
                                     -----------------------------------
                                     Thomas J. Reddish
                                     Executive Vice President and
                                     Chief Financial Officer







                                      -33-



EXHIBITS

Exhibit 31.1

Rule 13a-14/15d-14 Certification of CEO

I, Richard P. Smith, certify that;

    1.    I  have  reviewed  this  quarterly   report  on  Form  10-Q  of  TriCo
          Bancshares;
    2.    Based on my  knowledge,  this  quarterly  report  does not contain any
          untrue  statement of a material  fact or omit to state a material fact
          necessary to make the statements  made, in light of the  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this quarterly report;
    3.    Based on my knowledge,  the financial statements,  and other financial
          information  included in this quarterly report,  fairly present in all
          material respects the financial  condition,  results of operations and
          cash flows of the registrant as of, and for, the periods  presented in
          this quarterly report;
    4.    The registrant's  other  certifying  officer and I are responsible for
          establishing  and maintaining  disclosure  controls and procedures (as
          defined in Exchange Act Rules 13a-14 and 15d-14) and internal  control
          over financial  reporting (as defined in Exchange Act Rules 13-d-15(f)
          and 15d-15(f)) for the registrant and we have:
          a.   Designed such disclosure controls and procedures,  or caused such
               disclosure  controls  and  procedures  to be  designed  under our
               supervision,  to ensure that material information relating to the
               registrant,  including its consolidated subsidiary, is made known
               to us by others within those  entities,  particularly  during the
               period in which this quarterly report is being prepared;
          b.   Designed  such  internal  control over  financial  reporting,  or
               caused such  internal  control  over  financial  reporting  to be
               designed under our supervision,  to provide reasonable  assurance
               regarding  the   reliability  of  financial   reporting  and  the
               preparation  of financial  statements  for  external  purposes in
               accordance with generally accepted accounting principles;
          c.   Evaluated  the  effectiveness  of  the  registrant's   disclosure
               controls and procedures  and presented in this  quarterly  report
               our  conclusions   about  the  effectiveness  of  the  disclosure
               controls and  procedures,  as of the end of the period covered by
               this quarterly report based on such evaluation; and
          d.   Disclosed in this report any change in the registrant's  internal
               control  over  financial   reporting  that  occurred  during  the
               registrant's  most  recent  fiscal  quarter  that has  materially
               affected,  or is  reasonably  likely to  materially  affect,  the
               registrant's internal control over financial reporting;
    5.    The registrant's other certifying officer and I have disclosed,  based
          on our most recent  evaluation  of  internal  control  over  financial
          reporting, to the registrant's auditors and the audit committee of the
          registrant's board of directors;
          a.   All  significant  deficiencies  and  material  weaknesses  in the
               design or operation of internal control over financial  reporting
               which are reasonably  likely to adversely affect the registrant's
               ability to record, process,  summarize and report financial data;
               and
          b.   Any fraud,  whether or not material,  that involves management or
               other employees who have a significant  role in the  registrant's
               internal control over financial reporting.



Date: May 2, 2006                       /s/ Richard P. Smith
                                        ----------------------------------------
                                        Richard P. Smith
                                        President and Chief Executive Officer

                                      -34-



Exhibit 31.2

Rule 13a-14/15d-14 Certification of CFO

I, Thomas J. Reddish, certify that;


    1.    I  have  reviewed  this  quarterly   report  on  Form  10-Q  of  TriCo
          Bancshares;
    2.    Based on my  knowledge,  this  quarterly  report  does not contain any
          untrue  statement of a material  fact or omit to state a material fact
          necessary to make the statements  made, in light of the  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this quarterly report;
    3.    Based on my knowledge,  the financial statements,  and other financial
          information  included in this quarterly report,  fairly present in all
          material respects the financial  condition,  results of operations and
          cash flows of the registrant as of, and for, the periods  presented in
          this quarterly report;
    4.    The registrant's  other  certifying  officer and I are responsible for
          establishing  and maintaining  disclosure  controls and procedures (as
          defined in Exchange Act Rules 13a-14 and 15d-14) and internal  control
          over financial  reporting (as defined in Exchange Act Rules 13-d-15(f)
          and 15d-15(f)) for the registrant and we have:
          a.   Designed such disclosure controls and procedures,  or caused such
               disclosure  controls  and  procedures  to be  designed  under our
               supervision,  to ensure that material information relating to the
               registrant,  including its consolidated subsidiary, is made known
               to us by others within those  entities,  particularly  during the
               period in which this quarterly report is being prepared;
          b.   Designed  such  internal  control over  financial  reporting,  or
               caused such  internal  control  over  financial  reporting  to be
               designed under our supervision,  to provide reasonable  assurance
               regarding  the   reliability  of  financial   reporting  and  the
               preparation  of financial  statements  for  external  purposes in
               accordance with generally accepted accounting principles;
          c.   Evaluated  the  effectiveness  of  the  registrant's   disclosure
               controls and procedures  and presented in this  quarterly  report
               our  conclusions   about  the  effectiveness  of  the  disclosure
               controls and  procedures,  as of the end of the period covered by
               this quarterly report based on such evaluation; and
          d.   Disclosed in this report any change in the registrant's  internal
               control  over  financial   reporting  that  occurred  during  the
               registrant's  most  recent  fiscal  quarter  that has  materially
               affected,  or is  reasonably  likely to  materially  affect,  the
               registrant's internal control over financial reporting;
    5.    The registrant's other certifying officer and I have disclosed,  based
          on our most recent  evaluation  of  internal  control  over  financial
          reporting, to the registrant's auditors and the audit committee of the
          registrant's board of directors;
          a.   All  significant  deficiencies  and  material  weaknesses  in the
               design or operation of internal control over financial  reporting
               which are reasonably  likely to adversely affect the registrant's
               ability to record, process,  summarize and report financial data;
               and
          b.   Any fraud,  whether or not material,  that involves management or
               other employees who have a significant  role in the  registrant's
               internal control over financial reporting.



Date: May 2, 2006                       /s/ Thomas J. Reddish
                                        ----------------------------------------
                                        Thomas J. Reddish
                                        Executive Vice President and
                                        Chief Financial Officer

                                      -35-



Exhibit 32.1

Section 1350 Certification of CEO

In connection with the Quarterly  Report of TriCo  Bancshares (the "Company") on
Form 10-Q for the period ended March 31, 2006 as filed with the  Securities  and
Exchange  Commission  on the date hereof (the  "Report"),  I,  Richard P. Smith,
President and Chief Executive  Officer of the Company,  certify,  pursuant to 18
U.S.C.  Section 1350, as adopted  pursuant to Section 906 of the  Sarbanes-Oxley
Act of 2002, that:

        (1)    The Report fully complies with the  requirements of section 13(a)
               or 15(d) of the Securities Exchange Act of 1934; and
        (2)    The information  contained in the Report fairly presents,  in all
               material  respects,   the  financial  condition  and  results  of
               operations of the Company.


        /s/ Richard P. Smith
        -------------------------------------
        Richard P. Smith
        President and Chief Executive Officer

A signed  original of this  written  statement  required by Section 906 has been
provided  to TriCo  Bancshares  and will be  retained  by TriCo  Bancshares  and
furnished to the Securities and Exchange Commission or its staff upon request.

Exhibit 32.2

Section 1350 Certification of CFO

In connection with the Quarterly  Report of TriCo  Bancshares (the "Company") on
Form 10-Q for the period ended March 31, 2006 as filed with the  Securities  and
Exchange  Commission  on the date hereof (the  "Report"),  I, Thomas J. Reddish,
Executive Vice President and Chief  Financial  Officer of the Company,  certify,
pursuant to 18 U.S.C.  Section 1350,  as adopted  pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that:

        (1)    The Report fully complies with the  requirements of section 13(a)
               or 15(d) of the Securities Exchange Act of 1934; and
        (2)    The information  contained in the Report fairly presents,  in all
               material  respects,   the  financial  condition  and  results  of
               operations of the Company.


        /s/ Thomas J. Reddish
        -------------------------------------
        Thomas J. Reddish
        Executive Vice President and
        Chief Financial Officer

A signed  original of this  written  statement  required by Section 906 has been
provided  to TriCo  Bancshares  and will be  retained  by TriCo  Bancshares  and
furnished to the Securities and Exchange Commission or its staff upon request.

                                      -36-