PAGE  1
000 A000000 06/30/2007
000 C000000 809559
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 TCW STRATEGIC INCOME FUND, INC.
001 B000000 811-49800
001 C000000 8778294768
002 A000000 865 SOUTH FIGUEROA STREET
002 B000000 LOS ANGELES
002 C000000 CA
002 D010000 90017
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 TCW INVESTMENT MANAGEMENT COMPANY
008 B000001 A
008 C000001 801-29075
008 D010001 LOS ANGELES
008 D020001 CA
008 D030001 90017
010 A000001 STATE STREET BANK & TRUST COMPANY
010 B000001 85-720
010 C010001 BOSTON
010 C020001 MA
010 C030001 02116
012 A000001 BNY MELLON SHAREOWNER SERVICES
012 B000001 85-05006
012 C010001 NEW YORK
012 C020001 NY
012 C030001 10277
012 C040001 0770
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 LOS ANGELES
      PAGE  2
013 B020001 CA
013 B030001 90071
014 A000001 TCW BROKERAGE SERVICES
014 B000001 8-31114
014 A000002 COWEN & COMPANY, LLC
014 B000002 8-22522
014 A000003 FIMAT USA, LLC
014 B000003 8-47023
014 A000004 SG AMERICAS SECURITIES, LLC
014 B000004 8-66125
014 A000005 FIMAT PREFERRED LLC
014 B000005 8-66946
015 A000001 STATE STREET BANK & TRUST COMPANY
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02116
015 E010001 X
018  000000 Y
019 A000000 N
019 B000000    0
020 A000001 GOLDMAN SACHS GROUP, INC.
020 B000001 13-5108880
020 C000001      8
020 A000002 OSCAR GRUSS & SON, INC.
020 B000002 13-2913779
020 C000002      3
020 A000003 INSTINET GROUP, INC.
020 B000003 13-4134098
020 C000003      3
020 A000004 CITIGROUP GLOBAL MARKETS, INC.
020 B000004 11-2418191
020 C000004      2
020 A000005 BANK OF AMERICA SECURITIES, LLC
020 B000005 56-2058405
020 C000005      1
020 A000006 CANTOR FITZGERALD & CO.
020 B000006 13-3680184
020 C000006      1
020 A000007 CREDIT SUISSE GROUP
020 B000007 13-5659485
020 C000007      1
020 A000008 UBS SECURITIES
020 B000008 13-3873456
020 C000008      1
020 A000009 MORGAN STANLEY
020 B000009 13-2655998
020 C000009      1
020 A000010 JEFFERIES & COMPANY
020 B000010 95-2622900
020 C000010      1
      PAGE  3
021  000000       25
022 A000001 DEUTSCHE BANK AG
022 B000001 13-2730828
022 C000001     63959
022 D000001     90232
022 A000002 J.P. MORGAN CHASE & CO., INC.
022 B000002 13-3224016
022 C000002    108310
022 D000002       937
022 A000003 CREDIT SUISSE GROUP
022 B000003 13-5659485
022 C000003     80535
022 D000003      2277
022 A000004 GOLDMAN SACHS GROUP, INC.
022 B000004 13-5108880
022 C000004     41090
022 D000004       847
022 A000005 BARCLAYS CAPITAL INC.
022 B000005 06-1031656
022 C000005     38637
022 D000005         0
022 A000006 MERRILL LYNCH & CO., INC.
022 B000006 13-5674085
022 C000006     16732
022 D000006      2040
022 A000007 BANK OF AMERICA SECURITIES, LLC
022 B000007 56-2058405
022 C000007     13457
022 D000007      1380
022 A000008 LEHMAN BROTHERS, INC.
022 B000008 13-2518466
022 C000008     10811
022 D000008         0
022 A000009 AMHERST SECURITIES GROUP, LP
022 B000009 76-0651103
022 C000009      8770
022 D000009         0
022 A000010 MORGAN STANLEY
022 B000010 13-2655998
022 C000010      2845
022 D000010      1264
023 C000000    3802081
023 D000000     105472
024  000000 Y
025 A000001 BANK OF AMERICA SECURITIES, LLC
025 B000001 56-2058405
025 C000001 D
025 D000001    4618
025 A000002 CREDIT SUISSE GROUP
025 B000002 13-5659485
025 C000002 D
      PAGE  4
025 D000002    4157
025 A000003 BARCLAYS CAPITAL INC.
025 B000003 06-1031656
025 C000003 D
025 D000003    1155
025 A000004 J.P. MORGAN CHASE & CO., INC.
025 B000004 13-3224016
025 C000004 D
025 D000004    1100
025 A000005 J.P. MORGAN CHASE & CO., INC.
025 B000005 13-3224016
025 C000005 E
025 D000005     485
025 A000006 CITIGROUP GLOBAL MARKETS, INC.
025 B000006 11-2418191
025 C000006 E
025 D000006     451
025 A000007 MERRILL LYNCH & CO., INC.
025 B000007 13-5674085
025 C000007 E
025 D000007     284
025 A000008 MORGAN STANLEY
025 B000008 13-2655998
025 C000008 D
025 D000008     231
026 A000000 N
026 B000000 Y
026 C000000 Y
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
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
      PAGE  5
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  0.000
048 A010000   100000
048 A020000 0.750
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
      PAGE  6
048 H010000        0
048 H020000 0.000
048 I010000        0
048 I020000 0.000
048 J010000        0
048 J020000 0.000
048 K010000   100000
048 K020000 0.500
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 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 N
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
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  21.4
062 M000000   0.0
062 N000000  27.2
      PAGE  7
062 O000000   0.0
062 P000000   8.5
062 Q000000  56.7
062 R000000  15.5
063 A000000   0
063 B000000 19.7
064 A000000 N
064 B000000 N
066 A000000 Y
066 B000000 N
066 C000000 N
066 D000000 N
066 E000000 N
066 F000000 N
066 G000000 Y
067  000000 N
068 A000000 N
068 B000000 N
069  000000 N
070 A010000 Y
070 A020000 N
070 B010000 Y
070 B020000 N
070 C010000 Y
070 C020000 N
070 D010000 Y
070 D020000 N
070 E010000 N
070 E020000 N
070 F010000 Y
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 Y
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 N
070 M020000 N
070 N010000 Y
070 N020000 Y
070 O010000 Y
070 O020000 Y
070 P010000 N
070 P020000 N
      PAGE  8
070 Q010000 N
070 Q020000 N
070 R010000 Y
070 R020000 N
071 A000000    105074
071 B000000    128509
071 C000000    281900
071 D000000   37
072 A000000  6
072 B000000     9526
072 C000000     1506
072 D000000        0
072 E000000        0
072 F000000      699
072 G000000       49
072 H000000        0
072 I000000       19
072 J000000       10
072 K000000        0
072 L000000       25
072 M000000       38
072 N000000        0
072 O000000        0
072 P000000      623
072 Q000000       19
072 R000000       49
072 S000000       48
072 T000000        0
072 U000000        0
072 V000000        0
072 W000000      100
072 X000000     1679
072 Y000000        0
072 Z000000     9353
072AA000000     6633
072BB000000     1582
072CC010000        0
072CC020000    28091
072DD010000     9332
072DD020000        0
072EE000000        0
073 A010000   0.1960
073 A020000   0.0000
073 B000000   0.0000
073 C000000   0.0000
074 A000000        0
074 B000000        0
074 C000000    52087
074 D000000   225091
074 E000000    22951
074 F000000    14793
      PAGE  9
074 G000000        0
074 H000000        0
074 I000000        0
074 J000000     1804
074 K000000        0
074 L000000     1914
074 M000000        0
074 N000000   318640
074 O000000     1845
074 P000000      150
074 Q000000        0
074 R010000        0
074 R020000        0
074 R030000        0
074 R040000    73145
074 S000000        0
074 T000000   243500
074 U010000    47610
074 U020000        0
074 V010000     5.11
074 V020000     0.00
074 W000000   0.0000
074 X000000     1408
074 Y000000     3252
075 A000000        0
075 B000000   259972
076  000000     4.81
077 A000000 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 STOCK
087 A020000 872340104
087 A030000 TSI
088 A000000 N
088 B000000 N
      PAGE  10
088 C000000 N
088 D000000 N
SIGNATURE   MARK PENICK
TITLE       MANAGER