PAGE 1
000 B000000 10/31/2010
000 C000000 0000885601
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 INVESCO INSURED MUNICIPAL INCOME TRUST
001 B000000 811-06590
001 C000000 8002415477
002 A000000 1555 PEACHTREE ST., NE
002 B000000 ATLANTA
002 C000000 GA
002 D010000 30309
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
008 A000001 Invesco Advisers, Inc.
008 B000001 A
008 C000001 801-33949
008 D010001 HOUSTON
008 D020001 TX
008 D030001 77046
008 D040001 1173
008 A000002 Invesco Asset Management Deutschland GmbH
008 B000002 S
008 C000002 801-67712
008 D010002 Frankfurt
008 D050002 Germany
008 D060002 60313
008 A000003 Invesco Asset Management Limited
008 B000003 S
008 C000003 801-50197
008 D010003 London
008 D050003 United Kingdom
008 D060003 EC2A1AG
008 A000004 Invesco Asset Management (Japan) Ltd.
008 B000004 S
008 C000004 801-52601
008 D010004 Tokyo
008 D050004 Japan
008 D060004 105-6025
008 A000005 Invesco Australia Limited
008 B000005 S
008 C000005 801-68638
PAGE 2
008 D010005 Melbourne
008 D050005 Australia
008 D060005 3000
008 A000006 Invesco Hong Kong Limited
008 B000006 S
008 C000006 801-47856
008 D010006 HONG KONG
008 D050006 HONG KONG
008 A000007 Invesco Senior Secured Management, Inc.
008 B000007 S
008 C000007 801-38119
008 D010007 NEW YORK
008 D020007 NY
008 D030007 10036
008 D040007 2727
008 A000008 Invesco Trimark Ltd.
008 B000008 S
008 C000008 801-62166
008 D010008 TORONTO
008 D050008 CANADA
008 D060008 M2N 6X7
010 A000001 Invesco Management Group Inc.
010 B000001 33-67866
010 C010001 Houston
010 C020001 TX
010 C030001 77046
012 A000001 COMPUTERSHARE TRUST COMPANY, N.A.
012 B000001 85-11340
012 C010001 PROVIDENCE
012 C020001 RI
012 C030001 02940
012 C040001 0301
013 A000001 PricewaterhouseCoopers, LLP
013 B010001 HOUSTON
013 B020001 TX
013 B030001 77002
013 B040001 5678
014 A000001 ARIGIL MENKUL DEGERLER A.S.
014 B000001 8-00000
014 A000002 BANK MORGAN STANLEY AG
014 B000002 8-00000
014 A000003 BETTER ALTERNATIVE TRADING SYSTEM
014 B000003 8-00000
014 A000004 BLOCK INTEREST DISCOVERY SERVICE
014 B000004 8-00000
014 A000005 CHINA INTERNATIONAL CAPITAL CORP. HONG KONG S
014 B000005 8-00000
014 A000006 H.C. SECURITIES AND INVESTMENTS
014 B000006 8-00000
014 A000007 HTI VALORI MOBILIARE S.A.
014 B000007 8-00000
PAGE 3
014 A000008 MITSUBISHI UFJ SECURITIES CO. LTD
014 B000008 8-00000
014 A000009 MITSUBISHI UFJ SECURITIES INTERNATIONAL PLC
014 B000009 8-00000
014 A000010 MITSUBISHI UFJ TRUST & BANKING CORP.
014 B000010 8-00000
014 A000011 MORGAN STANLEY & CO. INCORPORATED
014 B000011 8-15869
014 A000012 MORGAN STANLEY & CO. INTERNATIONAL PLC
014 B000012 8-00000
014 A000013 MORGAN STANLEY ASIA (SINGAPORE) SECURITIES PT
014 B000013 8-00000
014 A000014 MORGAN STANLEY ASIA LIMITED
014 B000014 8-00000
014 A000015 MORGAN STANLEY CANADA LIMITED
014 B000015 8-00000
014 A000016 MORGAN STANLEY DEAN WITTER ASIA (SINGAPORE) P
014 B000016 8-00000
014 A000017 MORGAN STANLEY DEAN WITTER AUSTRALIA LIMITED
014 B000017 8-00000
014 A000018 MORGAN STANLEY DEAN WITTER C.T.V.M. S.A.
014 B000018 8-00000
014 A000019 MORGAN STANLEY DISTRIBUTION, INC.
014 B000019 8-44766
014 A000020 MORGAN STANLEY DISTRIBUTORS INC.
014 B000020 8-45262
014 A000021 MORGAN STANLEY FUTURES (HONG KONG) LIMITED
014 B000021 8-00000
014 A000022 MORGAN STANLEY HONG KONG SECURITIES LIMITED
014 B000022 8-00000
014 A000023 MORGAN STANLEY INDIA COMPANY PRIVATE LTD.
014 B000023 8-00000
014 A000024 MORGAN STANLEY JAPAN SECURITIES CO., LTD.
014 B000024 8-00000
014 A000025 MORGAN STANLEY MARKET PRODUCTS INC.
014 B000025 8-37795
014 A000026 MORGAN STANLEY SECURITIES LIMITED
014 B000026 8-00000
014 A000027 MORGAN STANLEY SMITH BARNEY, LLC
014 B000027 8-68191
014 A000028 MORGAN STANLEY TAIWAN LIMITED
014 B000028 8-00000
014 A000029 MORGAN STANLEY, S.V. S.A.
014 B000029 8-00000
014 A000030 MS SECURITIES SERVICES INC.
014 B000030 8-26804
014 A000031 MUNICENTER
014 B000031 8-00000
014 A000032 OOO MORGAN STANLEY BANK
014 B000032 8-00000
014 A000033 PRIME DEALER SERVICES CORP.
PAGE 4
014 B000033 8-47025
014 A000034 RMB MORGAN STANLEY
014 B000034 8-00000
014 A000035 UNION BANC INVESTMENT SERVICES
014 B000035 8-30706
014 A000036 VAN KAMPEN FUNDS INC.
014 B000036 8-19412
014 A000037 BANK OF TOKYO - MITSUBISHI UFJ LTD.
014 B000037 8-00000
014 A000038 MORGAN STANLEY DEAN WITTER AUSTRALIA SECURITI
014 B000038 8-00000
014 A000039 MORGAN STANLEY MUFG SECURITIES CO., LTD.
014 B000039 8-00000
014 A000040 MORGAN STANLEY INDIA FINANCIAL SERVICES PRIVA
014 B000040 8-00000
014 A000041 MORGAN STANLEY SMITH BARNEY FINANCING, LLC
014 B000041 8-00000
014 A000042 MORGAN STANLEY SMITH BARNEY AUSTRALIA PTY LTD
014 B000042 8-00000
014 A000043 OLIVETREE SECURITIES LTD
014 B000043 8-00000
014 A000044 MITSUBISHI UFJ MORGAN STANLEY SECURITIES CO.
014 B000044 8-00000
015 A000001 STATE STREET BANK AND TRUST COMPANY
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02111
015 E010001 X
018 000000 Y
019 A000000 Y
019 B000000 225
019 C000000 INVESCOFDS
020 A000001 GOLDMAN, SACHS & CO.
020 B000001 13-5108880
020 C000001 5
021 000000 5
022 A000001 CITIGROUP GLOBAL MARKETS INC.
022 B000001 11-2418191
022 C000001 14605
022 D000001 11464
022 A000002 WELLS FARGO SECURITIES, LLC
022 B000002 56-2326000
022 C000002 7484
022 D000002 4200
022 A000003 BANC OF AMERICA SECURITIES LLC
022 B000003 56-2058405
022 C000003 5925
022 D000003 3291
022 A000004 MESIROW FINANCIAL, INC.
022 B000004 36-3194849
PAGE 5
022 C000004 0
022 D000004 8314
022 A000005 J.P. MORGAN SECURITIES INC.
022 B000005 13-3299429
022 C000005 7090
022 D000005 1000
022 A000006 GOLDMAN, SACHS & CO.
022 B000006 13-5108880
022 C000006 3933
022 D000006 651
022 A000007 RAYMOND JAMES & ASSOCIATES, INC.
022 B000007 59-1237041
022 C000007 1991
022 D000007 2363
022 A000008 UBS FINANCIAL SERVICES INC.
022 B000008 13-2638166
022 C000008 0
022 D000008 3045
022 A000009 BARCLAYS CAPITAL INC.
022 B000009 06-1031656
022 C000009 1326
022 D000009 1083
022 A000010 GEORGE K. BAUM & CO.
022 B000010 43-1661917
022 C000010 2100
022 D000010 0
023 C000000 47207
023 D000000 36208
024 000000 N
026 A000000 N
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 Y
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 N
028 A010000 0
028 A020000 0
028 A030000 0
028 A040000 0
028 B010000 0
028 B020000 0
028 B030000 0
028 B040000 0
028 C010000 0
028 C020000 0
028 C030000 0
028 C040000 0
PAGE 6
028 D010000 0
028 D020000 0
028 D030000 0
028 D040000 0
028 E010000 0
028 E020000 0
028 E030000 0
028 E040000 0
028 F010000 0
028 F020000 0
028 F030000 0
028 F040000 0
028 G010000 0
028 G020000 0
028 G030000 0
028 G040000 0
028 H000000 0
030 A000000 0
030 B000000 0.00
030 C000000 0.00
031 A000000 0
031 B000000 0
032 000000 0
033 000000 0
035 000000 0
036 B000000 0
038 000000 0
042 A000000 0
042 B000000 0
042 C000000 0
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 0
044 000000 0
045 000000 Y
046 000000 Y
047 000000 Y
048 000000 0.270
048 A010000 0
048 A020000 0.000
048 B010000 0
048 B020000 0.000
048 C010000 0
048 C020000 0.000
048 D010000 0
048 D020000 0.000
048 E010000 0
048 E020000 0.000
PAGE 7
048 F010000 0
048 F020000 0.000
048 G010000 0
048 G020000 0.000
048 H010000 0
048 H020000 0.000
048 I010000 0
048 I020000 0.000
048 J010000 0
048 J020000 0.000
048 K010000 0
048 K020000 0.000
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 N
054 A000000 Y
054 B000000 Y
054 C000000 Y
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 Y
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 Y
054 M000000 Y
054 N000000 N
054 O000000 Y
055 A000000 Y
055 B000000 N
056 000000 Y
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 Y
060 B000000 Y
061 000000 0
062 A000000 Y
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 1.6
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
PAGE 8
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 146.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 0
063 B000000 15.7
064 A000000 Y
064 B000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 Y
070 A020000 N
070 B010000 N
070 B020000 N
070 C010000 Y
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 Y
070 E020000 Y
070 F010000 N
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 N
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 Y
070 J020000 N
070 K010000 Y
070 K020000 N
070 L010000 N
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 N
070 Q010000 N
070 Q020000 N
PAGE 9
070 R010000 N
070 R020000 N
071 A000000 33959
071 B000000 34983
071 C000000 462359
071 D000000 7
072 A000000 12
072 B000000 21918
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 1260
072 G000000 0
072 H000000 0
072 I000000 12
072 J000000 12
072 K000000 0
072 L000000 48
072 M000000 35
072 N000000 0
072 O000000 0
072 P000000 624
072 Q000000 266
072 R000000 40
072 S000000 176
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 272
072 X000000 2745
072 Y000000 3
072 Z000000 19176
072AA000000 0
072BB000000 763
072CC010000 16798
072CC020000 0
072DD010000 18004
072DD020000 0
072EE000000 0
073 A010000 0.8700
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 0
074 B000000 0
074 C000000 5142
074 D000000 467423
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
PAGE 10
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 6832
074 M000000 30
074 N000000 479427
074 O000000 1891
074 P000000 1
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 75450
074 S000000 82050
074 T000000 320035
074 U010000 20695
074 U020000 0
074 V010000 15.46
074 V020000 0.00
074 W000000 0.0000
074 X000000 5565
074 Y000000 0
075 A000000 0
075 B000000 394023
076 000000 15.32
077 A000000 Y
077 B000000 Y
077 C000000 Y
077 D000000 N
077 E000000 Y
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 Y
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 Y
077 Q020000 N
077 Q030000 N
078 000000 N
080 A000000 ICI MUTUAL INSURANCE COMPANY
080 C000000 55000
081 A000000 Y
081 B000000 235
082 A000000 Y
082 B000000 100
PAGE 11
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
087 A010000 SHARES OF BENEFICIAL INTEREST
087 A020000 46132P108
087 A030000 IIM
088 A000000 Y
088 B000000 N
088 C000000 N
088 D000000 Y
SIGNATURE KELLI GALLEGOS
TITLE ASSISTANT VP & TREASURER