PAGE 1 000 A000000 10/31/2010 000 C000000 0001137393 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 MUNICIPAL INCOME TRUST 001 B000000 811-10339 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 10022 012 A000001 COMPUTERSHARE TRUST COMPANY, N.A. (COMMON) 012 B000001 85-11340 012 C010001 PROVIDENCE 012 C020001 RI 012 C030001 02940 012 A000002 THE BANK OF NEW YORK MELLON (PREFERRED) 012 B000002 85-05006 PAGE 2 012 C010002 NEW YORK 012 C020002 NY 012 C030002 10286 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 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 1 020 A000002 JANNEY MONTGOMERY SCOTT LLC 020 B000002 23-0731260 020 C000002 0 020 C000003 0 020 C000004 0 020 C000005 0 PAGE 3 020 C000006 0 020 C000007 0 020 C000008 0 020 C000009 0 020 C000010 0 021 000000 1 022 A000001 FFI INSTITUTIONAL TAX-EXEMPT FUND 022 B000001 22-2509978 022 C000001 48932 022 D000001 68890 022 A000002 MORGAN STANLEY & CO. INCORPORATED 022 B000002 13-2655998 022 C000002 16409 022 D000002 12497 022 A000003 MERRILL LYNCH, PIERCE, FENNER & SMITH INC. 022 B000003 13-5674085 022 C000003 24083 022 D000003 0 022 A000004 J.P. MORGAN SECURITIES INC. 022 B000004 13-3299429 022 C000004 20171 022 D000004 1534 022 A000005 CITIGROUP GLOBAL MARKETS, INC. 022 B000005 11-2418191 022 C000005 5817 022 D000005 11445 022 A000006 MESIROW FINANCIAL, INC. 022 C000006 1149 022 D000006 15671 022 A000007 WELLS FARGO ADVISORS, LLC 022 B000007 54-0796506 022 C000007 6320 022 D000007 1670 022 A000008 PRAGER, SEALY & CO., LLC 022 B000008 94-3057440 022 C000008 0 022 D000008 7596 022 A000009 BB&T INVESTMENT SERVICES, INC. 022 C000009 0 022 D000009 5686 022 A000010 UBS SECURITIES LLC 022 B000010 13-3873456 022 C000010 0 022 D000010 5253 023 C000000 134753 023 D000000 148210 024 000000 N 026 A000000 N 026 B000000 N 026 C000000 N 026 D000000 Y PAGE 4 026 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 0.600 048 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 054 J000000 Y 054 K000000 N 054 L000000 N PAGE 5 054 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 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 0.5 062 M000000 0.0 062 N000000 0.0 062 O000000 154.7 062 P000000 0.0 062 Q000000 0.0 062 R000000 0.0 063 A000000 0 063 B000000 22.3 064 A000000 Y 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 Y 070 F010000 N 070 F020000 N PAGE 6 070 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 Y 070 L020000 N 070 M010000 Y 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 85839 071 B000000 82274 071 C000000 930758 071 D000000 9 072 A000000 6 072 B000000 25868 072 C000000 0 072 D000000 0 072 E000000 12 072 F000000 2823 072 G000000 48 072 H000000 0 072 I000000 23 072 J000000 23 072 K000000 0 072 L000000 58 072 M000000 38 072 N000000 8 072 O000000 0 072 P000000 282 072 Q000000 0 072 R000000 23 072 S000000 21 072 T000000 0 072 U000000 0 072 V000000 0 072 W000000 253 PAGE 7 072 X000000 3600 072 Y000000 117 072 Z000000 22397 072AA000000 2249 072BB000000 2216 072CC010000 17557 072CC020000 0 072DD010000 20946 072DD020000 0 072EE000000 0 073 A010000 0.4716 073 A020000 0.0000 073 B000000 0.0000 073 C000000 0.0000 074 A000000 112 074 B000000 0 074 C000000 0 074 D000000 938329 074 E000000 0 074 F000000 0 074 G000000 0 074 H000000 0 074 I000000 2848 074 J000000 630 074 K000000 1 074 L000000 14838 074 M000000 306 074 N000000 957064 074 O000000 0 074 P000000 492 074 Q000000 0 074 R010000 0 074 R020000 0 074 R030000 0 074 R040000 79081 074 S000000 270891 074 T000000 606600 074 U010000 44443 074 U020000 0 074 V010000 13.65 074 V020000 0.00 074 W000000 0.0000 074 X000000 22700 074 Y000000 270875 075 A000000 0 075 B000000 867420 076 000000 14.05 077 A000000 Y 077 Q010000 Y 078 000000 N 086 A010000 66 PAGE 8 086 A020000 881 086 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 09248F109 087 A030000 BFK 087 B010000 PREFERRED STOCK 088 A000000 N 088 B000000 N 088 C000000 N 088 D000000 Y SIGNATURE NEAL J. ANDREWS TITLE CFO