<PAGE> PAGE 1
000 A000000 11/30/98
000 C000000 0000876162
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 A
001 A000000 MSDW SHORT-TERM US TREASRY TRUST
001 B000000 811-6330
001 C000000 2123921600
002 A000000 2 WORLD TRADE CENTER
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10048
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 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B000001 A
008 C000001 801-42061
008 D010001 NEW YORK
008 D020001 NY
008 D030001 10048
011 A000001 MORGAN STANLEY DEAN WITTER DISTRIBUTORS INC.
011 B000001 8-45262
011 C010001 NEW YORK
011 C020001 NY
011 C030001 10048
012 A000001 MORGAN STANLEY DEAN WITTER TRUST FSB
012 B000001 84-1785
012 C010001 JERSEY CITY
012 C020001 NJ
012 C030001 07311
013 A000001 PRICEWATERHOUSECOOPERS LLP
013 B010001 NEW YORK
013 B020001 NY
<PAGE> PAGE 2
013 B030001 10036
014 A000001 DEAN WITTER REYNOLDS INC.
014 B000001 8-14172
014 A000002 MORGAN STANLEY & CO. INCORPORATED
014 B000002 8-15869
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 122
019 C000000 MSDW-FUNDS
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 FUJI SECURITIES INC.
022 B000001 36-2880742
022 C000001 66690
022 D000001 43280
022 A000002 WARBURG DILLON READ LLC
022 B000002 13-3873456
022 C000002 71815
022 D000002 23976
022 A000003 LEHMAN BROTHERS INC.
022 B000003 13-2518466
022 C000003 51724
022 D000003 15714
022 A000004 BARCLAYS CAPITAL GROUP
022 B000004 13-3551367
022 C000004 23924
022 D000004 31830
022 A000005 HSBC SECURITIES
022 B000005 13-2650272
022 C000005 27253
022 D000005 17625
022 A000006 GOLDMAN SACHS & CO.
022 B000006 13-5108880
022 C000006 25506
022 D000006 4982
022 A000007 PRUDENTIAL SECURITIES INC.
<PAGE> PAGE 3
022 B000007 22-2347336
022 C000007 7045
022 D000007 9542
022 A000008 RODNEY PACE, INC.
022 B000008 N/A
022 C000008 0
022 D000008 3897
022 A000009 NATIONSBANC CAPITAL FEDERAL BOOK ENTRY
022 B000009 56-1684171
022 C000009 3272
022 D000009 0
022 C000010 0
022 D000010 0
023 C000000 277229
023 D000000 151387
024 000000 N
025 D000001 0
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 N
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
028 A010000 31168
028 A020000 873
028 A030000 0
028 A040000 33274
028 B010000 25811
028 B020000 1043
028 B030000 0
028 B040000 24126
028 C010000 40867
028 C020000 867
028 C030000 0
028 C040000 22416
028 D010000 65224
028 D020000 1009
028 D030000 0
028 D040000 48873
028 E010000 154972
<PAGE> PAGE 4
028 E020000 979
028 E030000 0
028 E040000 89569
028 F010000 65968
028 F020000 948
028 F030000 0
028 F040000 59799
028 G010000 384010
028 G020000 5719
028 G030000 0
028 G040000 278057
028 H000000 384010
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
034 000000 N
035 000000 0
036 B000000 0
037 000000 N
038 000000 0
039 000000 N
040 000000 Y
041 000000 Y
042 A000000 0
042 B000000 0
042 C000000 100
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 494
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 0.350
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
<PAGE> PAGE 5
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 N
054 A000000 Y
054 B000000 Y
054 C000000 Y
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 Y
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 Y
054 M000000 Y
054 N000000 N
054 O000000 Y
055 A000000 N
055 B000000 N
056 000000 N
057 000000 N
058 A000000 N
059 000000 N
060 A000000 N
060 B000000 N
061 000000 1000
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
<PAGE> PAGE 6
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 100.0
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 2.6
064 A000000 N
064 B000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 N
070 A020000 N
070 B010000 N
070 B020000 N
070 C010000 N
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 N
070 E020000 N
070 F010000 N
070 F020000 N
070 G010000 N
070 G020000 N
070 H010000 N
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 N
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 N
070 O020000 N
070 P010000 N
070 P020000 N
070 Q010000 N
<PAGE> PAGE 7
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 198614
071 B000000 111465
071 C000000 267050
071 D000000 42
072 A000000 6
072 B000000 8200
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 494
072 G000000 0
072 H000000 0
072 I000000 53
072 J000000 5
072 K000000 0
072 L000000 19
072 M000000 12
072 N000000 41
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 16
072 S000000 12
072 T000000 494
072 U000000 0
072 V000000 0
072 W000000 7
072 X000000 1153
072 Y000000 0
072 Z000000 7047
072AA000000 232
072BB000000 384
072CC010000 6426
072CC020000 0
072DD010000 7252
072DD020000 0
072EE000000 0
073 A010000 0.2600
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 97
074 B000000 0
074 C000000 0
074 D000000 342678
074 E000000 0
074 F000000 0
074 G000000 0
<PAGE> PAGE 8
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 16161
074 M000000 63
074 N000000 358998
074 O000000 0
074 P000000 253
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 1280
074 S000000 0
074 T000000 357465
074 U010000 35288124
074 U020000 0
074 V010000 10.13
074 V020000 0.00
074 W000000 0.0000
074 X000000 7480
074 Y000000 0
075 A000000 0
075 B000000 281678
076 000000 0.00
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
SIGNATURE BARRY FINK
TITLE VICE PRESIDENT
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000876162
<NAME> MSDW SHORT-TERM U.S. TREASURY TRUST
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAY-31-1999
<PERIOD-END> NOV-30-1998
<INVESTMENTS-AT-COST> 336,252,564
<INVESTMENTS-AT-VALUE> 342,678,393
<RECEIVABLES> 16,160,800
<ASSETS-OTHER> 159,406
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 358,998,599
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,533,221
<TOTAL-LIABILITIES> 1,533,221
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 369,656,433
<SHARES-COMMON-STOCK> 35,228,124
<SHARES-COMMON-PRIOR> 24,192,405
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (18,616,884)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 6,425,829
<NET-ASSETS> 357,465,378
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 8,200,064
<OTHER-INCOME> 0
<EXPENSES-NET> 1,153,408
<NET-INVESTMENT-INCOME> 7,046,656
<REALIZED-GAINS-CURRENT> (152,106)
<APPREC-INCREASE-CURRENT> 3,911,484
<NET-CHANGE-FROM-OPS> 10,806,034
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (7,251,917)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 37,669,771
<NUMBER-OF-SHARES-REDEEMED> (27,141,320)
<SHARES-REINVESTED> 567,268
<NET-CHANGE-IN-ASSETS> 116,440,838
<ACCUMULATED-NII-PRIOR> 205,261
<ACCUMULATED-GAINS-PRIOR> (18,464,778)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 494,288
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,153,408
<AVERAGE-NET-ASSETS> 281,678,356
<PER-SHARE-NAV-BEGIN> 9.96
<PER-SHARE-NII> .25
<PER-SHARE-GAIN-APPREC> .18
<PER-SHARE-DIVIDEND> (.26)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.13
<EXPENSE-RATIO> .82
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
