PAGE 1 000 A000000 09/30/2006 000 C000000 0000890119 000 D000000 N 000 E000000 NF 000 F000000 Y 000 G000000 N 000 H000000 N 000 I000000 6.1 000 J000000 A 001 A000000 NUVEEN SELECT MATURITIES MUNICIPAL FUND 001 B000000 811-07056 001 C000000 3129178200 002 A000000 333 WEST WACKER DRIVE 002 B000000 CHICAGO 002 C000000 IL 002 D010000 60606 002 D020000 1286 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 NUVEEN ASSET MANAGEMENT 008 B000001 A 008 C000001 801-14147 008 D010001 CHICAGO 008 D020001 IL 008 D030001 60606 008 D040001 1286 012 A000001 EQUISERVE INC. 012 B000001 84-05925 012 C010001 PROVIDENCE 012 C020001 RI 012 C030001 02940 013 A000001 ERNST & YOUNG LLP 013 B010001 CHICAGO 013 B020001 IL 013 B030001 60606 014 A000001 NUVEEN INVESTMENTS, LLC 014 B000001 8-13464 PAGE 2 015 A000001 STATE STREET BANK AND TRUST COMPANY 015 B000001 C 015 C010001 BOSTON 015 C020001 MA 015 C030001 02110 015 E010001 X 018 000000 Y 019 A000000 Y 019 B000000 167 019 C000000 NUVEENFUND 020 C000001 0 020 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 0 022 A000001 WILLIAM BLAIR 022 B000001 36-2214610 022 C000001 3545 022 D000001 0 022 A000002 MORGAN STANLEY 022 B000002 13-2655998 022 C000002 3262 022 D000002 0 022 A000003 UBS 022 B000003 13-2638166 022 C000003 1060 022 D000003 0 022 C000004 0 022 D000004 0 022 C000005 0 022 D000005 0 022 C000006 0 022 D000006 0 022 C000007 0 022 D000007 0 022 C000008 0 022 D000008 0 022 C000009 0 022 D000009 0 022 C000010 0 022 D000010 0 023 C000000 7867 023 D000000 0 024 000000 N 025 D000001 0 PAGE 3 025 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 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 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 0 028 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 PAGE 4 032 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 N 048 000000 0.000 048 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 Y 053 A000000 N 054 A000000 Y 054 B000000 N 054 C000000 N 054 D000000 N 054 E000000 N PAGE 5 054 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 Y 055 A000000 Y 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 2.1 062 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 96.9 062 P000000 0.0 062 Q000000 0.0 062 R000000 0.0 063 A000000 0 063 B000000 6.5 064 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 PAGE 6 070 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 N 070 K010000 N 070 K020000 N 070 L010000 N 070 L020000 N 070 M010000 N 070 M020000 N 070 N010000 N 070 N020000 N 070 O010000 Y 070 O020000 Y 070 P010000 N 070 P020000 N 070 Q010000 N 070 Q020000 N 070 R010000 N 070 R020000 N 071 A000000 12238 071 B000000 14273 071 C000000 121303 071 D000000 10 072 A000000 6 072 B000000 3215 072 C000000 0 072 D000000 0 072 E000000 0 072 F000000 307 072 G000000 0 072 H000000 0 072 I000000 6 072 J000000 11 072 K000000 6 072 L000000 12 072 M000000 1 072 N000000 0 072 O000000 0 072 P000000 0 PAGE 7 072 Q000000 0 072 R000000 5 072 S000000 1 072 T000000 0 072 U000000 0 072 V000000 0 072 W000000 18 072 X000000 367 072 Y000000 0 072 Z000000 2848 072AA000000 0 072BB000000 22 072CC010000 911 072CC020000 0 072DD010000 2919 072DD020000 0 072EE000000 0 073 A010000 0.2355 073 A020000 0.0000 073 B000000 0.0000 073 C000000 0.0000 074 A000000 102 074 B000000 0 074 C000000 2600 074 D000000 122860 074 E000000 0 074 F000000 0 074 G000000 0 074 H000000 0 074 I000000 0 074 J000000 215 074 K000000 0 074 L000000 2044 074 M000000 3 074 N000000 127824 074 O000000 1064 074 P000000 50 074 Q000000 0 074 R010000 0 074 R020000 0 074 R030000 0 074 R040000 35 074 S000000 0 074 T000000 126675 074 U010000 12396 074 U020000 0 074 V010000 10.22 074 V020000 0.00 074 W000000 0.0000 074 X000000 410 074 Y000000 0 PAGE 8 075 A000000 0 075 B000000 125547 076 000000 9.77 077 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 087 A020000 67061T101 087 A030000 NIM 088 A000000 N 088 B000000 N 088 C000000 N 088 D000000 N SIGNATURE STEPHEN D. FOY TITLE V.P. & CONTROLLER