PAGE  1
000 A000000 04/30/2006
000 C000000 0000884152
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 VAN KAMPEN MUNICIPAL OPPORTUNITY TRUST
001 B000000 811-006567
001 C000000 2127625260
002 A000000 1221 AVENUE OF THE AMERICAS
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10020
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 N
007 B000000  0
007 C010100  1
007 C010200  2
007 C010300  3
007 C010400  4
007 C010500  5
007 C010600  6
007 C010700  7
007 C010800  8
007 C010900  9
007 C011000 10
008 A000001 VAN KAMPEN ASSET MANAGEMENT
008 B000001 A
008 C000001 801-1669
008 D010001 NEW YORK
008 D020001 NY
008 D030001 10020
010 A000001 VAN KAMPEN INVESTMENTS INC
010 B000001 8-19412
010 C010001 NEW YORK
010 C020001 NY
010 C030001 10020
012 A000001 COMPUTERSHARE TRUST COMPANY, N.A.
012 B000001 85-11340
012 C010001 PROVIDENCE
012 C020001 RI
012 C030001 02940
012 C040001 3010
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 CHICAGO
      PAGE  2
013 B020001 IL
013 B030001 60606
014 A000001 ARAB MALAYSIA SECURITIES
014 B000001 8-00000
014 A000002 CHINA INTERNATIONAL CAPITAL CORP. LTD
014 B000002 8-00000
014 A000003 HC SECURITIES
014 B000003 8-00000
014 A000004 JM MORGAN STANLEY FIXED INCOME SEC. PRIV. LTD
014 B000004 8-00000
014 A000005 JM MORGAN STANLEY PRIVATE LTD
014 B000005 8-00000
014 A000006 JM MORGAN STANLEY SECURITIES PRIVATE LTD
014 B000006 8-00000
014 A000007 JM MORGAN STANLEY RETAIL SERVICES PRIV. LTD
014 B000007 8-00000
014 A000008 MORGAN STANLEY & CO. INC.
014 B000008 8-15869
014 A000009 MORGAN STANLEY & CO. LTD
014 B000009 8-00000
014 A000010 MORGAN STANLEY ASIA LTD
014 B000010 8-00000
014 A000011 MORGAN STANLEY CANADA LTD
014 B000011 8-00000
014 A000012 MORGAN STANLEY QUILTER LTD
014 B000012 8-00000
014 A000013 MORGAN STANLEY DW AUSTRALIA SEC. LTD
014 B000013 8-00000
014 A000014 MORGAN STANLEY JAPAN LTD
014 B000014 8-00000
014 A000015 MORGAN STANLEY SV SA
014 B000015 8-00000
014 A000016 MORGAN STANLEY DW INC.
014 B000016 8-14172
014 A000017 MORGAN STANLEY INTERNATIONAL LTD
014 B000017 8-00000
014 A000018 MORGAN STANLEY SECURITIES LTD
014 B000018 8-00000
014 A000019 MORGAN STANLEY BANK AG
014 B000019 8-00000
014 A000020 MORGAN STANLEY DISTRIBUTION INC.
014 B000020 8-44766
014 A000021 MORGAN STANLEY DISTRIBUTORS INC.
014 B000021 8-45262
014 A000022 MORGAN STANLEY MARKET PRODUCTS INC.
014 B000022 8-37795
014 A000023 MS SECURITIES SERVICES INC.
014 B000023 8-26804
014 A000024 PRIME DEALER SERVICES CORP.
014 B000024 8-47025
014 A000025 VAN KAMPEN FUNDS INC.
      PAGE  3
014 B000025 8-19412
015 A000001 STATE STREET BANK AND TRUST CO.
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02111
015 E010001 X
018  000000 Y
019 A000000 Y
019 B000000   67
019 C000000 VANKAMPENF
020 A000001 ABN AMRO INC.
020 B000001 13-3227945
020 C000001     43
020 C000002      0
020 C000003      0
020 C000004      0
020 C000005      0
020 C000006      0
020 C000007      0
020 C000008      0
020 C000009      0
020 C000010      0
021  000000       43
022 A000001 CITIGROUP GLOBAL MARKETS INC.
022 B000001 13-3187336
022 C000001     46600
022 D000001     54969
022 A000002 MERRILL LYNCH, PIERCE, FENNER
022 B000002 13-5674085
022 C000002     26757
022 D000002     23480
022 A000003 CHASE SECURITIES INC.
022 B000003 13-2633612
022 C000003      7742
022 D000003     42034
022 A000004 FIRST ALBANY CAPITAL INC.
022 B000004 14-1391446
022 C000004     24751
022 D000004     17994
022 A000005 UBS FINANCIAL SERVICES INC.
022 B000005 13-2932996
022 C000005     15220
022 D000005     17410
022 A000006 BEAR STEARNS & CO INC.
022 B000006 13-3299429
022 C000006     24594
022 D000006      3915
022 A000007 UBS SECURITIES LLC
022 C000007     15900
022 D000007     10200
      PAGE  4
022 A000008 BANC OF AMERICA SECURITIES
022 B000008 56-2058405
022 C000008         0
022 D000008      7188
022 A000009 STEPHENS, INC
022 B000009 71-0211822
022 C000009      5686
022 D000009         0
022 A000010 FUNB FUNDS II AND ASSOCIATES
022 C000010      3675
022 D000010         0
023 C000000     184123
023 D000000     181967
024  000000 N
025 D000001       0
025 D000002       0
025 D000003       0
025 D000004       0
025 D000005       0
025 D000006       0
025 D000007       0
025 D000008       0
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
028 D010000         0
028 D020000         0
028 D030000         0
028 D040000         0
028 E010000         0
028 E020000         0
028 E030000         0
      PAGE  5
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 N
047  000000 Y
048  000000  0.550
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
048 F010000        0
048 F020000 0.000
048 G010000        0
048 G020000 0.000
048 H010000        0
048 H020000 0.000
048 I010000        0
      PAGE  6
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 N
054 C000000 N
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 N
054 M000000 Y
054 N000000 N
054 O000000 Y
055 A000000 Y
055 B000000 N
056  000000 N
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   0.3
062 F000000   0.0
062 G000000   0.0
062 H000000   0.0
062 I000000   0.0
062 J000000   0.0
062 K000000   0.0
062 L000000   0.0
062 M000000   0.0
062 N000000   0.0
062 O000000 160.0
062 P000000   0.0
062 Q000000   0.0
      PAGE  7
062 R000000   0.0
063 A000000   0
063 B000000 19.5
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 Y
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
070 R010000 N
070 R020000 N
071 A000000    107058
071 B000000    108443
071 C000000    676192
071 D000000   16
072 A000000  6
      PAGE  8
072 B000000    16377
072 C000000        0
072 D000000        0
072 E000000        0
072 F000000     1790
072 G000000        0
072 H000000        0
072 I000000       18
072 J000000       30
072 K000000        0
072 L000000       24
072 M000000       54
072 N000000        8
072 O000000        0
072 P000000        0
072 Q000000       38
072 R000000       16
072 S000000       34
072 T000000        0
072 U000000        0
072 V000000        0
072 W000000      649
072 X000000     2661
072 Y000000        0
072 Z000000    13716
072AA000000     4061
072BB000000        0
072CC010000        0
072CC020000     7884
072DD010000    10624
072DD020000        0
072EE000000     5328
073 A010000   0.4200
073 A020000   0.0000
073 B000000   0.3500
073 C000000   0.0000
074 A000000        7
074 B000000        0
074 C000000     1725
074 D000000   880154
074 E000000        0
074 F000000        0
074 G000000        0
074 H000000        0
074 I000000        0
074 J000000      291
074 K000000        0
074 L000000    14287
074 M000000      759
074 N000000   897223
074 O000000     5011
      PAGE  9
074 P000000      429
074 Q000000        0
074 R010000        0
074 R020000        0
074 R030000        0
074 R040000     1217
074 S000000   340463
074 T000000   550103
074 U010000    34173
074 U020000        0
074 V010000    16.10
074 V020000     0.00
074 W000000   0.0000
074 X000000     1765
074 Y000000    12063
075 A000000        0
075 B000000   656363
076  000000    15.43
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 Y
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 N
077 Q020000 N
077 Q030000 N
078  000000 N
080 C000000        0
081 B000000   0
082 B000000        0
083 B000000        0
084 B000000        0
086 A010000      0
086 A020000      0
086 B010000      0
086 B020000      0
086 C010000      0
086 C020000      0
086 D010000      0
086 D020000      0
      PAGE  10
086 E010000      0
086 E020000      0
086 F010000      0
086 F020000      0
087 A010000 COMMON
087 A020000 920935103
087 A030000 VMO
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 Y
SIGNATURE   KATHERINE UREVIG
TITLE       ASSISTANT TREASURER