<PAGE> PAGE 1
000 B000000 12/31/94
000 C000000 779129
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% US TREASURY LONG TERM FUND
001 B000000 811-4429
001 C000000 2129226820
002 A000000 144 GLENN CURTISS BOULEVARD
002 B000000 UNIONDALE
002 C000000 NY
002 D010000 11556
002 D020000 0144
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
011 A000001 PREMIER MUTUAL FUND SERVICES, INC.
011 B000001 8-47312
011 C010001 BOSTON
011 C020001 MA
011 C030001 02109
013 A000001 ERNST & YOUNG LLP
013 B010001 NEW YORK
013 B020001 NY
013 B030001 10019
015 A000001 THE BANK OF NEW YORK
015 B000001 C
015 C010001 NEW YORK
015 C020001 NY
015 C030001 10286
015 E010001 X
018 000000 Y
019 A000000 Y
019 B000000 153
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
<PAGE> PAGE 2
020 C000010 0
021 000000 0
022 A000001 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
022 B000001 13-5674085
022 C000001 1137924
022 D000001 1290207
022 A000002 G.X. CLARKE & CO.
022 B000002 13-2969143
022 C000002 380971
022 D000002 375806
022 A000003 GOLDMAN, SACHS & CO.
022 B000003 13-5108880
022 C000003 200674
022 D000003 188057
022 A000004 KIDDER, PEABODY & CO. INCORPORATED
022 B000004 13-5650440
022 C000004 211307
022 D000004 128716
022 A000005 UBS SECURITIES INC.
022 B000005 13-2932996
022 C000005 116297
022 D000005 80161
022 A000006 ARBOR TRADING, INC.
022 B000006 36-3540782
022 C000006 72092
022 D000006 55030
022 A000007 FUJI SECURITIES INC.
022 B000007 36-2880742
022 C000007 46831
022 D000007 46212
022 A000008 THE FIRST BOSTON CORPORATION
022 B000008 13-5659485
022 C000008 53828
022 D000008 38605
022 A000009 MORGAN STANLEY & CO. INCORPORATED
022 B000009 13-2655998
022 C000009 26519
022 D000009 61215
022 A000010 EASTBRIDGE CAPITAL INCORPORATED
022 B000010 13-3501117
022 C000010 56513
022 D000010 21796
023 C000000 2353682
023 D000000 2357915
028 A010000 9857
028 A020000 557
028 A030000 0
028 A040000 14909
028 B010000 4088
028 B020000 608
028 B030000 0
<PAGE> PAGE 3
028 B040000 12107
028 C010000 3118
028 C020000 522
028 C030000 0
028 C040000 5472
028 D010000 3691
028 D020000 492
028 D030000 0
028 D040000 8763
028 E010000 4946
028 E020000 481
028 E030000 0
028 E040000 6769
028 F010000 3675
028 F020000 511
028 F030000 0
028 F040000 7827
028 G010000 29375
028 G020000 3171
028 G030000 0
028 G040000 55847
028 H000000 0
029 000000 N
030 A000000 0
030 B000000 0.00
030 C000000 0.00
031 A000000 0
031 B000000 0
032 000000 0
033 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
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
<PAGE> PAGE 4
062 L000000 0.0
062 M000000 98.3
062 N000000 0.0
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 0
063 B000000 11.1
064 A000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
071 A000000 1816491
071 B000000 1899070
071 C000000 149747
071 D000000 1213
072 A000000 12
072 B000000 12669
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 943
072 G000000 0
072 H000000 0
072 I000000 415
072 J000000 24
072 K000000 0
072 L000000 14
072 M000000 27
072 N000000 45
072 O000000 1
072 P000000 0
072 Q000000 0
072 R000000 40
072 S000000 20
072 T000000 0
072 U000000 0
072 V000000 3
072 W000000 7
072 X000000 1539
072 Y000000 0
072 Z000000 11130
072AA000000 5489
072BB000000 31040
072CC010000 0
072CC020000 2077
072DD010000 11103
072DD020000 0
<PAGE> PAGE 5
072EE000000 0
073 A010000 1.0060
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 322
074 B000000 0
074 C000000 0
074 D000000 121298
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 3191
074 M000000 21
074 N000000 124832
074 O000000 0
074 P000000 64
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 1365
074 S000000 0
074 T000000 123403
074 U010000 9306740
074 U020000 0
074 V010000 13.26
074 V020000 0.00
074 W000000 0.0000
074 X000000 5439
074 Y000000 0
075 A000000 0
075 B000000 157242
076 000000 0.00
077 A000000 Y
077 B000000 Y
077 C000000 Y
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
<PAGE> PAGE 6
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 Y
080 A000000 NATIONAL UNION FIRE INSURANCE CO. OF PITTSBUR
080 B000000 VIGILANT INSURANCE CO.
080 C000000 105000
081 A000000 Y
081 B000000 146
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 JOHN J. PYBURN
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000779129
<NAME> DREYFUS 100% U.S. TREASURY LONG TERM FUND
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1994
<PERIOD-END> DEC-31-1994
<INVESTMENTS-AT-COST> 124755
<INVESTMENTS-AT-VALUE> 121298
<RECEIVABLES> 3191
<ASSETS-OTHER> 343
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 124832
<PAYABLE-FOR-SECURITIES> 1241
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 188
<TOTAL-LIABILITIES> 1429
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 152385
<SHARES-COMMON-STOCK> 9307
<SHARES-COMMON-PRIOR> 13726
<ACCUMULATED-NII-CURRENT> 27
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (25552)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (3457)
<NET-ASSETS> 123403
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 12669
<OTHER-INCOME> 0
<EXPENSES-NET> 1539
<NET-INVESTMENT-INCOME> 11130
<REALIZED-GAINS-CURRENT> (25552)
<APPREC-INCREASE-CURRENT> (2077)
<NET-CHANGE-FROM-OPS> (16499)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 11103
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 58192
<NUMBER-OF-SHARES-REDEEMED> (129600)
<SHARES-REINVESTED> 7256
<NET-CHANGE-IN-ASSETS> (91754)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 37333
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 943
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1539
<AVERAGE-NET-ASSETS> 157242
<PER-SHARE-NAV-BEGIN> 15.68
<PER-SHARE-NII> 1.01
<PER-SHARE-GAIN-APPREC> (2.42)
<PER-SHARE-DIVIDEND> (1.01)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 13.26
<EXPENSE-RATIO> .010
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
