PAGE 1
000 A000000 08/31/2017
000 C000000 0001059386
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 SENIOR INCOME TRUST
001 B000000 811-08743
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 Atlanta
008 D020001 GA
008 D030001 30309
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 Hong Kong Limited
008 B000005 S
008 C000005 801-47856
008 D010005 HONG KONG
PAGE 2
008 D050005 HONG KONG
008 A000006 Invesco Senior Secured Management, Inc.
008 B000006 S
008 C000006 801-38119
008 D010006 NEW YORK
008 D020006 NY
008 D030006 10036
008 D040006 2727
008 A000007 Invesco Canada Ltd.
008 B000007 S
008 C000007 801-62166
008 D010007 TORONTO
008 D050007 CANADA
008 D060007 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 CANTON
012 C020001 MA
012 C030001 02021
013 A000001 PRICEWATERHOUSE COOPERS, LLP
013 B010001 HOUSTON
013 B020001 TX
013 B030001 77002
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 144
019 C000000 INVESCOFDS
020 A000001 MORGAN STANLEY & CO., INC.
020 B000001 13-2655998
020 C000001 5
021 000000 5
022 A000001 STATE STREET GLOBAL MARKETS, LLC
022 B000001 04-3464336
022 C000001 185414
022 D000001 217039
022 A000002 BANC OF AMERICA SECURITIES LLC
022 B000002 56-2058405
022 C000002 66595
022 D000002 21818
022 A000003 J.P. MORGAN SECURITIES LLC
PAGE 3
022 B000003 13-4110995
022 C000003 66531
022 D000003 16653
022 A000004 BARCLAYS CAPITAL INC.
022 B000004 06-1031656
022 C000004 37112
022 D000004 18120
022 A000005 MORGAN STANLEY & CO., INC.
022 B000005 13-2655998
022 C000005 29023
022 D000005 20582
022 A000006 CITIGROUP GLOBAL MARKETS INC.
022 B000006 11-2418191
022 C000006 21334
022 D000006 27362
022 A000007 CREDIT SUISSE FIRST BOSTON LLC
022 B000007 05-0546650
022 C000007 32576
022 D000007 15894
022 A000008 GOLDMAN, SACHS & CO.
022 B000008 13-5108880
022 C000008 24095
022 D000008 15136
022 A000009 DEUTSCHE BANK SECURITIES INC.
022 B000009 13-2730828
022 C000009 14453
022 D000009 16095
022 A000010 UBS SECURITIES
022 B000010 13-3873456
022 C000010 13821
022 D000010 10931
023 C000000 548925
023 D000000 405743
024 000000 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 A010000 0
028 A020000 0
028 A030000 0
028 A040000 0
028 B010000 0
028 B020000 0
028 B030000 0
PAGE 4
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
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 0.850
048 A010000 0
048 A020000 0.000
048 B010000 0
048 B020000 0.000
048 C010000 0
PAGE 5
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
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 Y
053 B000000 Y
053 C000000 N
054 A000000 Y
054 B000000 N
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 N
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 N
054 M000000 Y
054 N000000 N
054 O000000 N
055 A000000 Y
055 B000000 Y
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
PAGE 6
062 D000000 0.0
062 E000000 0.0
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 6.8
062 M000000 0.0
062 N000000 0.0
062 O000000 0.0
062 P000000 7.6
062 Q000000 125.7
062 R000000 8.4
063 A000000 0
063 B000000 5.2
064 A000000 N
064 B000000 Y
065 000000 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 N
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 Y
070 L010000 Y
070 L020000 Y
070 M010000 Y
070 M020000 Y
PAGE 7
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 Y
070 P010000 Y
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 359526
071 B000000 367073
071 C000000 1280645
071 D000000 28
072 A000000 6
072 B000000 30383
072 C000000 67
072 D000000 0
072 E000000 865
072 F000000 5321
072 G000000 0
072 H000000 0
072 I000000 10
072 J000000 386
072 K000000 0
072 L000000 70
072 M000000 17
072 N000000 90
072 O000000 0
072 P000000 4346
072 Q000000 1252
072 R000000 75
072 S000000 53
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 150
072 X000000 11770
072 Y000000 12
072 Z000000 19557
072AA000000 0
072BB000000 6441
072CC010000 0
072CC020000 964
072DD010000 23765
072DD020000 0
072EE000000 0
073 A010000 0.1320
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
PAGE 8
074 A000000 21032
074 B000000 0
074 C000000 59687
074 D000000 1168386
074 E000000 247
074 F000000 46267
074 G000000 0
074 H000000 0
074 I000000 26883
074 J000000 53739
074 K000000 0
074 L000000 6265
074 M000000 965
074 N000000 1383471
074 O000000 78766
074 P000000 0
074 Q000000 379590
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 48458
074 S000000 0
074 T000000 876657
074 U010000 180036
074 U020000 0
074 V010000 4.87
074 V020000 0.00
074 W000000 0.0000
074 X000000 314
074 Y000000 0
075 A000000 0
075 B000000 981516
076 000000 4.44
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
PAGE 9
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
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
087 A010000 COMMON
087 A020000 46131H107
087 A030000 VVR
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 N
SIGNATURE KELLI GALLEGOS
TITLE VICE PRESIDNET & ASSISTANT TREASURER