PAGE 1
000 A000000 11/30/2010
000 C000000 0000835333
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 MUNICIPAL INCOME OPPORTUNITIES TRUST
001 B000000 811-05597
001 C000000 7136261919
002 A000000 11 GREENWAY PLAZA
002 B000000 HOUSTON
002 C000000 TX
002 D010000 77046
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 1
007 C010100 1
007 C020100 Invesco Municipal Income Opportunities Trust
007 C030100 N
008 A00AA01 Invesco Advisers, Inc.
008 B00AA01 A
008 C00AA01 801-33949
008 D01AA01 Atlanta
008 D02AA01 GA
008 D03AA01 30309
008 A00AA02 Invesco Asset Management Deutschland GmbH
008 B00AA02 S
008 C00AA02 801-67712
008 D01AA02 Frankfurt
008 D05AA02 Germany
008 D06AA02 60313
008 A00AA03 Invesco Asset Management Limited
008 B00AA03 S
008 C00AA03 801-50197
008 D01AA03 London
008 D05AA03 United Kingdom
008 D06AA03 EC2A1AG
008 A00AA04 Invesco Asset Management (Japan) Ltd.
008 B00AA04 S
008 C00AA04 801-52601
008 D01AA04 Tokyo
008 D05AA04 Japan
008 D06AA04 105-6025
008 A00AA05 Invesco Australia Limited
008 B00AA05 S
PAGE 2
008 C00AA05 801-68638
008 D01AA05 Melbourne
008 D05AA05 Australia
008 D06AA05 3000
008 A00AA06 Invesco Hong Kong Limited
008 B00AA06 S
008 C00AA06 801-47856
008 D01AA06 HONG KONG
008 D05AA06 HONG KONG
008 A00AA07 Invesco Senior Secured Management, Inc.
008 B00AA07 S
008 C00AA07 801-38119
008 D01AA07 NEW YORK
008 D02AA07 NY
008 D03AA07 10036
008 D04AA07 2727
008 A00AA08 Invesco Trimark Ltd.
008 B00AA08 S
008 C00AA08 801-62166
008 D01AA08 TORONTO
008 D05AA08 CANADA
008 D06AA08 M2N 6X7
010 A00AA01 Invesco Management Group Inc.
010 B00AA01 33-67866
010 C01AA01 Houston
010 C02AA01 TX
010 C03AA01 77046
012 A00AA01 COMPUTERSHARE TRUST COMPANY, N.A.
012 B00AA01 84-00000
012 C01AA01 PROVIDENCE
012 C02AA01 RI
012 C03AA01 02940
012 C04AA01 3078
013 A00AA01 PricewaterhouseCoopers, LLP
013 B01AA01 HOUSTON
013 B02AA01 TX
013 B03AA01 77002
013 B04AA01 5678
014 A00AA01 ARIGIL MENKUL DEGERLER A.S.
014 B00AA01 8-00000
014 A00AA02 BANK MORGAN STANLEY AG
014 B00AA02 8-00000
014 A00AA03 BETTER ALTERNATIVE TRADING SYSTEM
014 B00AA03 8-00000
014 A00AA04 BLOCK INTEREST DISCOVERY SERVICE
014 B00AA04 8-00000
014 A00AA05 MORGAN STANLEY S.V. S.A.
014 B00AA05 8-00000
014 A00AA06 MS SECURITIES SERVICES INC.
014 B00AA06 8-26804
014 A00AA07 MUNICENTER
PAGE 3
014 B00AA07 8-00000
014 A00AA08 OOO MORGAN STANLEY BANK
014 B00AA08 8-00000
014 A00AA09 PRIME DEALER SERVICES CORP.
014 B00AA09 8-47025
014 A00AA10 RMB MORGAN STANLEY
014 B00AA10 8-00000
014 A00AA11 VAN KAMPEN FUNDS INC
014 B00AA11 8-19412
014 A00AA12 Bank of Tokyo - Mitsubishi UFJ Ltd.
014 B00AA12 8-00000
014 A00AA13 Mitsubishi UFJ Morgan Stanley Securities Co.
014 B00AA13 8-00000
014 A00AA14 Mitsubishi UFJ Securities International Plc
014 B00AA14 8-00000
014 A00AA15 Mitsubishi UFJ Trust & Banking Corp.
014 B00AA15 8-00000
014 A00AA16 Unionbanc Investment Services
014 B00AA16 8-30706
014 A00AA17 Morgan Stanley Smith Barney LLC
014 B00AA17 8-68191
014 A00AA18 MS Asia (Singapore) Securities PTE Ltd.
014 B00AA18 8-00000
014 A00AA19 Morgan Stanley DW Asia (Singapore) PTE
014 B00AA19 8-00000
014 A00AA20 Morgan Stanley MUFG Securities Co., Ltd.
014 B00AA20 8-00000
014 A00AA21 MS India Financial Services Private Ltd.
014 B00AA21 8-00000
014 A00AA22 MS Smith Barney Financing LLC
014 B00AA22 8-00000
014 A00AA23 MS Smith Barney Australia PTY Ltd.
014 B00AA23 8-00000
014 A00AA24 Olivetree Securities Ltd.
014 B00AA24 8-00000
014 A00AA25 Mitsubishi UFJ Morgan Stanley Securities Co.
014 B00AA25 8-00000
014 A00AA26 China Intl Capital Corp Hong Kong Sec. Ltd
014 B00AA26 8-00000
014 A00AA27 H.C. SECURITIES AND INVESTMENTS
014 B00AA27 8-00000
014 A00AA28 HTI VALORI MOBILIARE S.A.
014 B00AA28 8-00000
014 A00AA29 MORGAN STANLEY & CO., INC.
014 B00AA29 8-15869
014 A00AA30 MORGAN STANLEY & CO INTERNATIONAL
014 B00AA30 8-00000
014 A00AA31 MORGAN STANLEY ASIA LIMIITED
014 B00AA31 8-00000
014 A00AA32 MORGAN STANLEY CANADA LTD
014 B00AA32 8-00000
PAGE 4
014 A00AA33 MORGAN STANLEY DEAN WITTER AUSTRALIA LTD
014 B00AA33 8-00000
014 A00AA34 MORGAN STANLEY DEAN WITTER AUSTRAILA SEC LTD
014 B00AA34 8-00000
014 A00AA35 MORGAN STANLEY DEAN WITTER CTVM SA
014 B00AA35 8-00000
014 A00AA36 MORGAN STANLEY DISTRIBUTION, INC.
014 B00AA36 8-44766
014 A00AA37 MORGAN STANLEY DISTRIBUTORS INC.
014 B00AA37 8-45262
014 A00AA38 MORGAN STANLEY FUTURES (HONG KONG) LIMITED
014 B00AA38 8-00000
014 A00AA39 MORGAN STANLEY HONG KONG SECURITIES LIMIITED
014 B00AA39 8-00000
014 A00AA40 MORGAN STANLEY INDIA COMPANY PRIVATE LIMITED
014 B00AA40 8-00000
014 A00AA41 MORGAN STANLEY JAPAN SECURITIES CO LTD
014 B00AA41 8-00000
014 A00AA42 MORGAN STANLEY MARKET PRODUCTS INC.
014 B00AA42 8-37795
014 A00AA43 MORGAN STANLEY SECURITIES LIMITED
014 B00AA43 8-00000
014 A00AA44 MORGAN STANLEY TAIWAN LTD
014 B00AA44 8-00000
015 A00AA01 STATE STREET BANK AND TRUST COMPANY
015 B00AA01 C
015 C01AA01 BOSTON
015 C02AA01 MA
015 C03AA01 02111
015 E01AA01 X
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 225
019 C00AA00 INVESCOFDS
021 000000 0
022 A000001 BANC OF AMERICA SECURITIES LLC
022 B000001 56-2058405
022 C000001 5538
022 D000001 3000
022 A000002 PIPER JAFFRAY & CO.
022 B000002 41-0953246
022 C000002 4592
022 D000002 3000
022 A000003 MORGAN STANLEY & CO., INC.
022 B000003 13-2655998
022 C000003 3714
022 D000003 1717
022 A000004 J.P. MORGAN SECURITIES INC.
022 B000004 13-3299429
022 C000004 725
022 D000004 3808
PAGE 5
022 A000005 GOLDMAN, SACHS & CO.
022 B000005 13-5108880
022 C000005 896
022 D000005 1798
022 A000006 B.C. ZIEGLER AND COMPANIES
022 B000006 39-0727640
022 C000006 1167
022 D000006 1327
022 A000007 MESIROW FINANCIAL, INC.
022 B000007 36-3194849
022 C000007 400
022 D000007 910
022 A000008 LANCASTER POLARD & CO.
022 B000008 31-1253650
022 C000008 796
022 D000008 0
022 A000009 SCOTT & STRINGFELLOW, LLC
022 B000009 54-0294670
022 C000009 0
022 D000009 697
022 A000010 HERBERT J. SIMS & CO. INC.
022 B000010 13-5213180
022 C000010 691
022 D000010 0
023 C000000 22248
023 D000000 17641
024 00AA00 N
026 A000000 N
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 N
028 A01AA00 0
028 A02AA00 0
028 A03AA00 0
028 A04AA00 0
028 B01AA00 0
028 B02AA00 0
028 B03AA00 0
028 B04AA00 0
028 C01AA00 0
028 C02AA00 0
028 C03AA00 0
028 C04AA00 0
028 D01AA00 0
028 D02AA00 0
PAGE 6
028 D03AA00 0
028 D04AA00 0
028 E01AA00 0
028 E02AA00 0
028 E03AA00 0
028 E04AA00 0
028 F01AA00 0
028 F02AA00 0
028 F03AA00 0
028 F04AA00 0
028 G01AA00 0
028 G02AA00 0
028 G03AA00 0
028 G04AA00 0
028 H00AA00 0
030 A00AA00 0
030 B00AA00 0.00
030 C00AA00 0.00
031 A00AA00 0
031 B00AA00 0
032 00AA00 0
033 00AA00 0
035 00AA00 0
036 B00AA00 0
038 00AA00 0
042 A00AA00 0
042 B00AA00 0
042 C00AA00 0
042 D00AA00 0
042 E00AA00 0
042 F00AA00 0
042 G00AA00 0
042 H00AA00 0
043 00AA00 0
044 00AA00 0
045 00AA00 Y
046 00AA00 N
047 00AA00 Y
048 00AA00 0.500
048 A01AA00 0
048 A02AA00 0.000
048 B01AA00 0
048 B02AA00 0.000
048 C01AA00 0
048 C02AA00 0.000
048 D01AA00 0
048 D02AA00 0.000
048 E01AA00 0
048 E02AA00 0.000
048 F01AA00 0
048 F02AA00 0.000
PAGE 7
048 G01AA00 0
048 G02AA00 0.000
048 H01AA00 0
048 H02AA00 0.000
048 I01AA00 0
048 I02AA00 0.000
048 J01AA00 0
048 J02AA00 0.000
048 K01AA00 0
048 K02AA00 0.000
049 00AA00 N
050 00AA00 N
051 00AA00 N
052 00AA00 N
053 A00AA00 N
054 A00AA00 Y
054 B00AA00 N
054 C00AA00 N
054 D00AA00 N
054 E00AA00 N
054 F00AA00 N
054 G00AA00 N
054 H00AA00 Y
054 I00AA00 N
054 J00AA00 Y
054 K00AA00 N
054 L00AA00 N
054 M00AA00 Y
054 N00AA00 N
054 O00AA00 N
055 A00AA00 Y
055 B00AA00 N
056 00AA00 Y
057 00AA00 N
058 A00AA00 N
059 00AA00 Y
060 A00AA00 Y
060 B00AA00 Y
061 00AA00 0
062 A00AA00 Y
062 B00AA00 0.0
062 C00AA00 0.0
062 D00AA00 0.0
062 E00AA00 1.3
062 F00AA00 0.0
062 G00AA00 0.0
062 H00AA00 0.0
062 I00AA00 0.0
062 J00AA00 0.0
062 K00AA00 0.0
062 L00AA00 0.0
PAGE 8
062 M00AA00 0.0
062 N00AA00 0.0
062 O00AA00 104.7
062 P00AA00 0.0
062 Q00AA00 0.0
062 R00AA00 0.0
063 A00AA00 0
063 B00AA00 21.3
064 A00AA00 Y
064 B00AA00 Y
065 00AA00 N
066 A00AA00 N
067 00AA00 N
068 A00AA00 N
068 B00AA00 N
069 00AA00 N
070 A01AA00 Y
070 A02AA00 N
070 B01AA00 N
070 B02AA00 N
070 C01AA00 Y
070 C02AA00 N
070 D01AA00 N
070 D02AA00 N
070 E01AA00 Y
070 E02AA00 N
070 F01AA00 N
070 F02AA00 N
070 G01AA00 Y
070 G02AA00 N
070 H01AA00 N
070 H02AA00 N
070 I01AA00 N
070 I02AA00 N
070 J01AA00 Y
070 J02AA00 Y
070 K01AA00 Y
070 K02AA00 N
070 L01AA00 Y
070 L02AA00 N
070 M01AA00 N
070 M02AA00 N
070 N01AA00 Y
070 N02AA00 N
070 O01AA00 Y
070 O02AA00 N
070 P01AA00 Y
070 P02AA00 N
070 Q01AA00 N
070 Q02AA00 N
070 R01AA00 N
PAGE 9
070 R02AA00 N
071 A000100 13365
071 B000100 12401
071 C000100 140354
071 D000100 9
072 A000100 6
072 B000100 4679
072 C000100 0
072 D000100 0
072 E000100 0
072 F000100 338
072 G000100 0
072 H000100 0
072 I000100 4
072 J000100 3
072 K000100 0
072 L000100 0
072 M000100 15
072 N000100 0
072 O000100 0
072 P000100 31
072 Q000100 25
072 R000100 22
072 S000100 7
072 T000100 0
072 U000100 0
072 V000100 0
072 W000100 39
072 X000100 484
072 Y000100 0
072 Z000100 4195
072AA000100 0
072BB000100 2252
072CC010100 653
072CC020100 0
072DD010100 4120
072DD020100 0
072EE000100 0
073 A010100 0.2100
073 A020100 0.0000
073 B000100 0.0000
073 C000100 0.0000
074 A000100 0
074 B000100 0
074 C000100 1700
074 D000100 137851
074 E000100 0
074 F000100 0
074 G000100 0
074 H000100 0
074 I000100 0
PAGE 10
074 J000100 39
074 K000100 0
074 L000100 2501
074 M000100 25
074 N000100 142116
074 O000100 400
074 P000100 0
074 Q000100 0
074 R010100 0
074 R020100 0
074 R030100 0
074 R040100 10039
074 S000100 0
074 T000100 131677
074 U010100 19620
074 U020100 0
074 V010100 6.71
074 V020100 0.00
074 W000100 0.0000
074 X000100 352
074 Y000100 0
075 A000100 0
075 B000100 135032
076 000100 6.42
077 A000000 Y
077 B000000 N
077 C000000 Y
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 N
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 C00AA00 0
081 B00AA00 0
082 B00AA00 0
083 B00AA00 0
084 B00AA00 0
086 A010000 0
086 A020000 0
PAGE 11
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 COMMON
087 A020000 46132X101
087 A030000 OIA
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 N
SIGNATURE KELLI GALLEGOS
TITLE ASSISTANT VP AND ASSISTANT TREASURER