<PAGE> PAGE 1
000 B000000 01/31/98
000 C000000 871967
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 U
001 A000000 DREYFUS MASS. MUNICIPAL MONEY MARKET FUND
001 B000000 811-6273
001 C000000 2129226792
002 A000000 200 PARK AVENUE
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10166
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
018 000000 Y
019 A000000 Y
019 B000000 152
019 C000000 DREYFUSFAM
022 A000001 BT SECURITIES CORPORATION
022 B000001 13-3131014
022 C000001 55100
022 D000001 59990
022 A000002 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
022 B000002 13-5674085
022 C000002 72000
022 D000002 27645
022 A000003 SMITH BARNEY INC.
022 B000003 13-1912900
022 C000003 45400
022 D000003 50900
022 A000004 GOLDMAN, SACHS & CO.
022 B000004 13-5108880
022 C000004 69400
022 D000004 11400
022 A000005 MORGAN STANLEY & CO. INCORPORATED
022 B000005 13-2655998
022 C000005 32700
022 D000005 3605
022 A000006 SBC CAPITAL MARKETS, INC.
022 B000006 13-3498485
022 C000006 19900
022 D000006 12700
022 A000007 J.P. MORGAN SECURITIES INC.
<PAGE> PAGE 2
022 B000007 13-3224016
022 C000007 21000
022 D000007 0
022 A000008 BEAR, STEARNS & CO. INC.
022 B000008 13-3299429
022 C000008 20376
022 D000008 0
022 A000009 LEHMAN BROTHERS INC.
022 B000009 13-2518466
022 C000009 19000
022 D000009 0
022 A000010 STATE STREET BANK AND TRUST COMPANY, N.A.
022 B000010 04-1867445
022 C000010 16661
022 D000010 1300
023 C000000 408345
023 D000000 184092
028 A010000 20654
028 A020000 270
028 A030000 0
028 A040000 23106
028 B010000 21014
028 B020000 277
028 B030000 0
028 B040000 25475
028 C010000 77665
028 C020000 284
028 C030000 0
028 C040000 53088
028 D010000 31149
028 D020000 283
028 D030000 0
028 D040000 50694
028 E010000 41286
028 E020000 303
028 E030000 0
028 E040000 35053
028 F010000 43268
028 F020000 282
028 F030000 0
028 F040000 42903
028 G010000 235036
028 G020000 1699
028 G030000 0
028 G040000 230319
028 H000000 0
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 Y
<PAGE> PAGE 3
053 B000000 Y
053 C000000 N
062 A000000 Y
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 99.7
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 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 55
063 B000000 0.0
064 A000000 Y
064 B000000 N
071 A000000 0
071 B000000 0
071 C000000 0
071 D000000 0
072 A000000 12
072 B000000 6465
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 899
072 G000000 0
072 H000000 0
072 I000000 140
072 J000000 20
072 K000000 0
072 L000000 9
072 M000000 9
072 N000000 25
072 O000000 1
072 P000000 0
072 Q000000 0
072 R000000 25
072 S000000 13
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 7
<PAGE> PAGE 4
072 X000000 1148
072 Y000000 23
072 Z000000 5340
072AA000000 0
072BB000000 3
072CC010000 0
072CC020000 0
072DD010000 5340
072DD020000 0
072EE000000 0
073 A010000 0.0297
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 0
074 B000000 0
074 C000000 179100
074 D000000 0
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 1390
074 M000000 10
074 N000000 180500
074 O000000 0
074 P000000 81
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 756
074 S000000 0
074 T000000 179663
074 U010000 179712
074 U020000 0
074 V010000 1.00
074 V020000 0.00
074 W000000 0.9999
074 X000000 2487
074 Y000000 0
075 A000000 179826
075 B000000 0
076 000000 0.00
077 A000000 Y
080 A000000 VIGILANT INSURANCE COMPANY
080 B000000 NATIONAL UNION FIRE INSURANCE CO. OF PITTS/PA
080 C000000 125000
<PAGE> PAGE 5
081 A000000 Y
081 B000000 166
082 A000000 N
082 B000000 0
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
SIGNATURE MICHAEL PETRUCELLI
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000871967
<NAME> DREYFUS MASSACHUSETTS MUNICIPAL MONEY MARKET FUND
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> JAN-31-1998
<PERIOD-END> JAN-31-1998
<INVESTMENTS-AT-COST> 179100
<INVESTMENTS-AT-VALUE> 179100
<RECEIVABLES> 1390
<ASSETS-OTHER> 10
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 180500
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 837
<TOTAL-LIABILITIES> 837
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 179698
<SHARES-COMMON-STOCK> 179712
<SHARES-COMMON-PRIOR> 192028
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (34)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 179663
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 6465
<OTHER-INCOME> 0
<EXPENSES-NET> 1125
<NET-INVESTMENT-INCOME> 5340
<REALIZED-GAINS-CURRENT> (3)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 5338
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (5340)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 390207
<NUMBER-OF-SHARES-REDEEMED> (405902)
<SHARES-REINVESTED> 3364
<NET-CHANGE-IN-ASSETS> (12333)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (32)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 899
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1148
<AVERAGE-NET-ASSETS> 179826
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .030
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.300)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .006
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>