<PAGE> PAGE 1
000 A000000 06/30/96
000 C000000 0000779128
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 100% U.S. TREASURY MONEY MARKET FUND
001 B000000 811-4430
001 C000000 2129226822
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 161
019 C000000 DREYFUSFAM
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 BARCLAYS DE ZOETE WEDD SECURITIES, INC.
022 B000001 13-3551367
022 C000001 714217
022 D000001 537866
022 A000002 UBS SECURITIES INC.
022 B000002 13-2932996
022 C000002 748197
022 D000002 313655
022 A000003 SMITH BARNEY INC.
022 B000003 13-1912900
022 C000003 247233
022 D000003 184634
022 A000004 DILLON, READ & CO. INC.
022 B000004 13-1939216
<PAGE> PAGE 2
022 C000004 314072
022 D000004 70339
022 A000005 PARIBAS CORP.
022 B000005 13-3235334
022 C000005 169373
022 D000005 126284
022 A000006 CS FIRST BOSTON CORPORATION
022 B000006 13-5659485
022 C000006 98564
022 D000006 169640
022 A000007 NESBITT BURNS SECURITIES, INC.
022 B000007 13-2620737
022 C000007 225468
022 D000007 0
022 A000008 AUBREY G. LANSTON & CO. INC.
022 B000008 13-5552129
022 C000008 94902
022 D000008 74626
022 A000009 HSBC SECURITIES, INC.
022 B000009 13-2650272
022 C000009 98655
022 D000009 23849
022 A000010 BA SECURITIES, INC.
022 B000010 95-4035346
022 C000010 120941
022 D000010 0
023 C000000 3088593
023 D000000 1500894
026 A000000 Y
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
028 A010000 224940
028 A020000 5353
028 A030000 0
028 A040000 239056
028 B010000 142747
028 B020000 4445
028 B030000 0
028 B040000 150776
028 C010000 141546
028 C020000 4344
028 C030000 0
028 C040000 148145
028 D010000 184526
028 D020000 4688
<PAGE> PAGE 3
028 D030000 0
028 D040000 223827
028 E010000 179345
028 E020000 4437
028 E030000 0
028 E040000 173718
028 F010000 138327
028 F020000 4004
028 F030000 0
028 F040000 191988
028 G010000 1011431
028 G020000 27271
028 G030000 0
028 G040000 1127510
028 H000000 0
055 A000000 N
055 B000000 N
056 000000 N
057 000000 N
062 A000000 Y
062 B000000 94.2
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 0.0
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 81
063 B000000 0.0
064 A000000 N
064 B000000 N
071 A000000 0
071 B000000 0
071 C000000 0
071 D000000 0
072 A000000 6
072 B000000 33475
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 3183
<PAGE> PAGE 4
072 G000000 0
072 H000000 0
072 I000000 1226
072 J000000 45
072 K000000 0
072 L000000 8
072 M000000 36
072 N000000 19
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 16
072 S000000 9
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 14
072 X000000 4556
072 Y000000 0
072 Z000000 28919
072AA000000 26
072BB000000 221
072CC010000 0
072CC020000 0
072DD010000 28965
072DD020000 0
072EE000000 0
073 A010000 0.0226
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 3784
074 B000000 0
074 C000000 1150983
074 D000000 0
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 50000
074 K000000 0
074 L000000 17532
074 M000000 97
074 N000000 1222396
074 O000000 0
074 P000000 622
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
<PAGE> PAGE 5
074 R040000 131
074 S000000 0
074 T000000 1221643
074 U010000 1221265
074 U020000 0
074 V010000 1.00
074 V020000 0.00
074 W000000 1.0000
074 X000000 34957
074 Y000000 0
075 A000000 1280170
075 B000000 0
076 000000 0.00
077 A000000 N
SIGNATURE ELIZABETH A. BACHMAN
TITLE V.P.& ASST. SECTY.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000779128
<NAME> DREYFUS 100% U.S. TREASURY MONEY MARKET FUND
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1996
<INVESTMENTS-AT-COST> 1150983
<INVESTMENTS-AT-VALUE> 1150983
<RECEIVABLES> 67532
<ASSETS-OTHER> 3881
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1222396
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 753
<TOTAL-LIABILITIES> 753
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1221554
<SHARES-COMMON-STOCK> 1221265
<SHARES-COMMON-PRIOR> 1310072
<ACCUMULATED-NII-CURRENT> 297
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (208)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 1221643
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 33475
<OTHER-INCOME> 0
<EXPENSES-NET> 4556
<NET-INVESTMENT-INCOME> 28919
<REALIZED-GAINS-CURRENT> (195)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 28724
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (28965)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1011431
<NUMBER-OF-SHARES-REDEEMED> (1127510)
<SHARES-REINVESTED> 27271
<NET-CHANGE-IN-ASSETS> (89048)
<ACCUMULATED-NII-PRIOR> 343
<ACCUMULATED-GAINS-PRIOR> (13)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3183
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4556
<AVERAGE-NET-ASSETS> 1280170
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .023
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.023)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .007
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
