PAGE  1
000 B000000 07/31/2010
000 C000000 0001137391
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 BLACKROCK CALIFORNIA MUNICIPAL INCOME TRUST
001 B000000 811-10331
001 C000000 8004417762
002 A000000 100 BELLEVUE PARKWAY
002 B000000 WILMINGTON
002 C000000 DE
002 D010000 19809
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 BLACKROCK ADVISORS, LLC
008 B000001 A
008 C000001 801-47710
008 D010001 WILMINGTON
008 D020001 DE
008 D030001 19809
008 A000002 BLACKROCK FINANCIAL MANAGEMENT, INC.
008 B000002 S
008 C000002 801-48433
008 D010002 NEW YORK
008 D020002 NY
008 D030002 10055
012 A000001 COMPUTERSHARE TRUST COMPANY, N.A. (COMMON)
012 B000001 85-11340
012 C010001 PROVIDENCE
012 C020001 RI
012 C030001 02940
012 A000002 BNY MELLON SHAREOWNER SERVICES (PREFERRED)
012 B000002 85-05006
      PAGE  2
012 C010002 JERSEY CITY
012 C020002 NJ
012 C030002 07310
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 PRINCETON
013 B020001 NJ
013 B030001 08540
014 A000001 BLACKROCK CAPITAL MARKETS, LLC
014 B000001 8-67827
014 A000002 BLACKROCK EXECUTION SERVICES
014 B000002 8-48719
014 A000003 BLACKROCK FUND DISTRIBUTION COMPANY
014 B000003 8-67795
014 A000004 BLACKROCK INVESTMENTS, LLC
014 B000004 8-48436
014 A000005 HARRIS WILLIAMS LLC
014 B000005 8-53380
014 A000006 PNC CAPITAL MARKETS, INC.
014 B000006 8-32493
014 A000007 PNC INVESTMENTS LLC
014 B000007 8-66195
014 A000008 RED CAPITAL MARKETS, INC.
014 B000008 8-31175
015 A000001 STATE STREET BANK AND TRUST COMPANY
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02111
015 E010001 X
015 A000002 THE BANK OF NEW YORK MELLON
015 B000002 S
015 C010002 NEW YORK
015 C020002 NY
015 C030002 10286
015 E010002 X
015 A000003 J.P. MORGAN CHASE BANK
015 B000003 S
015 C010003 NEW YORK
015 C020003 NY
015 C030003 10017
015 E010003 X
018  000000 Y
019 A000000 Y
019 B000000  279
019 C000000 BLKRKADVSR
020 A000001 RBS SECURITIES INC.
020 C000001      0
020 A000002 JANNEY MONTGOMERY SCOTT LLC
020 B000002 23-0731260
020 C000002      0
020 C000003      0
      PAGE  3
020 C000004      0
020 C000005      0
020 C000006      0
020 C000007      0
020 C000008      0
020 C000009      0
020 C000010      0
021  000000        0
022 A000001 BIF CALIFORNIA MUNICIPAL MONEY FUND
022 B000001 22-2891156
022 C000001    203742
022 D000001    181197
022 A000002 CITIGROUP GLOBAL MARKETS, INC.
022 B000002 11-2418191
022 C000002     61969
022 D000002     45821
022 A000003 MORGAN STANLEY & CO. INCORPORATED
022 B000003 13-2655998
022 C000003     56012
022 D000003     30135
022 A000004 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
022 B000004 13-5674085
022 C000004     34735
022 D000004     27539
022 A000005 JEFFERIES & COMPANY, INC.
022 B000005 95-2622900
022 C000005     15477
022 D000005     13153
022 A000006 WELLS FARGO ADVISORS, LLC
022 B000006 54-0796506
022 C000006     27055
022 D000006         0
022 A000007 J.P. MORGAN SECURITIES INC.
022 B000007 13-3299429
022 C000007     19933
022 D000007      5168
022 A000008 UBS SECURITIES LLC
022 B000008 13-3873456
022 C000008       521
022 D000008     16551
022 A000009 BARCLAYS CAPITAL INC.
022 C000009       559
022 D000009     14784
022 A000010 GOLDMAN, SACHS & CO.
022 B000010 13-5108880
022 C000010      3015
022 D000010     10610
023 C000000     473827
023 D000000     413140
024  000000 N
026 A000000 N
      PAGE  4
026 B000000 N
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027  000000 N
045  000000 Y
046  000000 N
047  000000 Y
048  000000  0.580
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
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 Y
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 N
054 H000000 Y
054 I000000 N
      PAGE  5
054 J000000 Y
054 K000000 N
054 L000000 N
054 M000000 Y
054 N000000 N
055 A000000 N
055 B000000 N
056  000000 Y
057  000000 N
058 A000000 N
059  000000 Y
060 A000000 N
060 B000000 N
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   5.8
062 M000000   0.0
062 N000000   0.0
062 O000000 163.5
062 P000000   0.0
062 Q000000   0.0
062 R000000   0.0
063 A000000   0
063 B000000 19.8
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
      PAGE  6
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 Y
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 Y
070 R020000 N
071 A000000    273731
071 B000000    237105
071 C000000    501027
071 D000000   47
072 A000000 12
072 B000000    26695
072 C000000        0
072 D000000        0
072 E000000        6
072 F000000     3097
072 G000000       83
072 H000000        0
072 I000000       37
072 J000000       27
072 K000000        0
072 L000000       61
072 M000000       40
072 N000000       13
072 O000000        0
072 P000000      579
072 Q000000        0
072 R000000       38
072 S000000       33
072 T000000        0
072 U000000      181
      PAGE  7
072 V000000        0
072 W000000      228
072 X000000     4417
072 Y000000      284
072 Z000000    22568
072AA000000     3853
072BB000000    10711
072CC010000    38736
072CC020000        0
072DD010000    21334
072DD020000        0
072EE000000        0
073 A010000   0.9084
073 A020000   0.0000
073 B000000   0.0000
073 C000000   0.0000
074 A000000       27
074 B000000        0
074 C000000        0
074 D000000   742934
074 E000000        0
074 F000000        0
074 G000000        0
074 H000000        0
074 I000000    26178
074 J000000      764
074 K000000        0
074 L000000    10386
074 M000000       89
074 N000000   780378
074 O000000    23612
074 P000000      344
074 Q000000        0
074 R010000        0
074 R020000        0
074 R030000        0
074 R040000   130788
074 S000000   171335
074 T000000   454299
074 U010000    31814
074 U020000        0
074 V010000    14.28
074 V020000     0.00
074 W000000   0.0000
074 X000000    12472
074 Y000000   187137
075 A000000        0
075 B000000   447224
076  000000    14.21
077 A000000 Y
077 B000000 Y
      PAGE  8
078  000000 N
080 A000000 VIGILANT INSURANCE COMPANY
080 B000000 NATIONAL UNION FIRE INSURANCE COMPANY
080 C000000    85000
081 A000000 Y
081 B000000  98
082 A000000 N
082 B000000        0
083 A000000 N
083 B000000        0
084 A000000 N
084 B000000        0
085 A000000 Y
085 B000000 N
086 A010000  16666
086 A020000 229131
086 B010000      0
086 B020000      0
086 C010000      4
086 C020000 100325
086 D010000      0
086 D020000      0
086 E010000      0
086 E020000      0
086 F010000      0
086 F020000      0
087 A010000 COMMON STOCK
087 A020000 09248E102
087 A030000 BFZ
087 B010000 PREFERRED STOCK
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 Y
SIGNATURE   NEAL J. ANDREWS
TITLE       CFO