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<PAGE> PAGE 6
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<PAGE> PAGE 10
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 14
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 17
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<PAGE> PAGE 18
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<PAGE> PAGE 19
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<PAGE> PAGE 20
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<PAGE> PAGE 21
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<PAGE> PAGE 22
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<PAGE> PAGE 23
070 H020500 N
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<PAGE> PAGE 24
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<PAGE> PAGE 25
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<PAGE> PAGE 26
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<PAGE> PAGE 27
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<PAGE> PAGE 28
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<PAGE> PAGE 29
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<PAGE> PAGE 30
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<PAGE> PAGE 31
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<PAGE> PAGE 32
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<PAGE> PAGE 33
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<PAGE> PAGE 34
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<PAGE> PAGE 35
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<PAGE> PAGE 36
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<PAGE> PAGE 37
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<PAGE> PAGE 38
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<PAGE> PAGE 39
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<PAGE> PAGE 40
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<PAGE> PAGE 41
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<PAGE> PAGE 42
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072 G001000 0
072 H001000 0
072 I001000 8
072 J001000 2
072 K001000 0
072 L001000 5
072 M001000 1
072 N001000 2
072 O001000 0
072 P001000 0
072 Q001000 0
072 R001000 10
072 S001000 2
072 T001000 40
072 U001000 0
072 V001000 0
072 W001000 4
072 X001000 168
072 Y001000 0
072 Z001000 1275
072AA001000 4
072BB001000 0
072CC011000 0
072CC021000 1145
072DD011000 1255
072DD021000 0
072EE001000 492
073 A011000 0.2600
073 A021000 0.0000
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073 C001000 0.0000
074 A001000 38
074 B001000 0
074 C001000 2800
<PAGE> PAGE 43
074 D001000 50143
074 E001000 0
074 F001000 0
074 G001000 0
074 H001000 0
074 I001000 0
074 J001000 0
074 K001000 0
074 L001000 870
074 M001000 4
074 N001000 53855
074 O001000 0
074 P001000 28
074 Q001000 0
074 R011000 0
074 R021000 0
074 R031000 0
074 R041000 51
074 S001000 0
074 T001000 53776
074 U011000 4969
074 U021000 0
074 V011000 10.82
074 V021000 0.00
074 W001000 0.0000
074 X001000 1076
074 Y001000 0
075 A001000 0
075 B001000 53963
076 001000 0.00
SIGNATURE BARRY FINK
TITLE VICE PRESIDENT
<TABLE>
<CAPTION>
Exhibit 77(0) Morgan Stanley Dean Witter Multi-State
Municipal Series Trust
10f-3 transactions for the period November 1, 1998 - May 31,
1999
<S> <C> <C> <C>
<C> <C> <C> <C> <C>
TOTAL
ISSUED/
DATE PRICE
SHARES % OF PRINCIPAL PURCHASED
FUND/SERIES SECURITY PURCHASED SHARE
PURCHASED ASSETS AMOUNT BY GROUP BROKER(S)
Multi-State Muni- MI Michigan Municipal Bond 11/6/98 $104.44
500,000 2.826% $304,970,000 3.279% Salomon Smith
Authority, School Ser 1998
Barney
Multi-State Muni- NY NYS Urban Development 11/18/98 $102.06
500,000 4.154% $403,160,000 2.108% Salomon Smith
Corporation (AMBAC)
Barney
Multi-State Muni- AZ PR Housing Finance, 12/18/98 $100.00
1,000,000 2.404% $114,815,000 1.742% Merrill Lynch
GNMA-Backed Mortgage
Revenue Bonds
Multi-State Muni- MI PR Housing Finance, 12/18/98 $100.00
500,000 2.800% $114,815,000 1.742% Merrill Lynch
GNMA-Backed Mortgage
Revenue Bonds
Multi-State Muni- NY PR Housing Finance, 12/18/98 $100.00
400,000 3.309% $114,815,000 1.742% Merrill Lynch
GNMA-Backed Mortgage
Revenue Bonds
Multi-State Muni- CA San Diego County 12/17/98 $93.81
2,000,000 1.893% $73,115,000 2.735% Merrill Lynch
Courthouse (AMBAC)- COP
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Multi-State Municipal Series Trust
Arizona Series Semi-Annual
</LEGEND>
<CIK> 0000869427
<NAME> MSDW MULTI-STATE MUNICIPAL SERIES TRUST
<SERIES>
<NUMBER> 1
<NAME> ARIZONA SERIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-1999
<PERIOD-END> MAY-31-1999
<INVESTMENTS-AT-COST> 39,212,936
<INVESTMENTS-AT-VALUE> 40,632,435
<RECEIVABLES> 885,402
<ASSETS-OTHER> 10,341
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 41,528,178
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (186,084)
<TOTAL-LIABILITIES> (186,084)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 39,710,973
<SHARES-COMMON-STOCK> 3,951,345
<SHARES-COMMON-PRIOR> 3,852,209
<ACCUMULATED-NII-CURRENT> 15,298
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 195,694
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,419,499
<NET-ASSETS> 41,342,094
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,097,881
<OTHER-INCOME> 0
<EXPENSES-NET> (134,846)
<NET-INVESTMENT-INCOME> 963,035
<REALIZED-GAINS-CURRENT> 142,198
<APPREC-INCREASE-CURRENT> (960,383)
<NET-CHANGE-FROM-OPS> 144,850
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (948,340)
<DISTRIBUTIONS-OF-GAINS> (555,653)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 296,506
<NUMBER-OF-SHARES-REDEEMED> (273,815)
<SHARES-REINVESTED> 76,445
<NET-CHANGE-IN-ASSETS> (313,116)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 609,149
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (72,558)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (133,613)
<AVERAGE-NET-ASSETS> 41,575,571
<PER-SHARE-NAV-BEGIN> 10.81
<PER-SHARE-NII> .25
<PER-SHARE-GAIN-APPREC> (.21)
<PER-SHARE-DIVIDEND> (.25)
<PER-SHARE-DISTRIBUTIONS> (.14)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.46
<EXPENSE-RATIO> .65
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Multi-State Municipal Series Trust
California Series Semi-Annual
</LEGEND>
<CIK> 0000869427
<NAME> MSDW MULTI-STATE MUNICIPAL SERIES TRUST
<SERIES>
<NUMBER> 2
<NAME> CALIFORNIA SERIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-1999
<PERIOD-END> MAY-31-1999
<INVESTMENTS-AT-COST> 98,559,723
<INVESTMENTS-AT-VALUE> 102,950,030
<RECEIVABLES> 2,005,508
<ASSETS-OTHER> 103,564
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 105,059,102
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (97,146)
<TOTAL-LIABILITIES> (97,146)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 99,901,697
<SHARES-COMMON-STOCK> 9,692,023
<SHARES-COMMON-PRIOR> 9,376,038
<ACCUMULATED-NII-CURRENT> 40,753
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 629,199
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4,390,307
<NET-ASSETS> 104,961,956
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2,795,906
<OTHER-INCOME> 0
<EXPENSES-NET> (313,767)
<NET-INVESTMENT-INCOME> 2,482,139
<REALIZED-GAINS-CURRENT> 629,204
<APPREC-INCREASE-CURRENT> (2,539,094)
<NET-CHANGE-FROM-OPS> 572,249
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2,441,386)
<DISTRIBUTIONS-OF-GAINS> (1,789,764)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 595,159
<NUMBER-OF-SHARES-REDEEMED> (481,595)
<SHARES-REINVESTED> 202,421
<NET-CHANGE-IN-ASSETS> (213,485)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1,789,759
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (182,569)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (316,285)
<AVERAGE-NET-ASSETS> 104,611,668
<PER-SHARE-NAV-BEGIN> 11.22
<PER-SHARE-NII> .26
<PER-SHARE-GAIN-APPREC> (.20)
<PER-SHARE-DIVIDEND> (.26)
<PER-SHARE-DISTRIBUTIONS> (.19)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.83
<EXPENSE-RATIO> .61
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Mogan Stanley Dean Witter Multi-State Municipal Trust Series
Florida Series Semi-Annual
</LEGEND>
<CIK> 0000869427
<NAME> MSDW MULTI-STATE MUNICIPAL SERIES TRUST
<SERIES>
<NUMBER> 3
<NAME> FLORIDA SERIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-1999
<PERIOD-END> MAY-31-1999
<INVESTMENTS-AT-COST> 56,012,509
<INVESTMENTS-AT-VALUE> 58,388,022
<RECEIVABLES> 751,501
<ASSETS-OTHER> 205,557
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 59,345,080
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (58,803)
<TOTAL-LIABILITIES> (58,803)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 56,309,565
<SHARES-COMMON-STOCK> 5,535,213
<SHARES-COMMON-PRIOR> 5,447,042
<ACCUMULATED-NII-CURRENT> 22,826
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 578,373
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2,375,513
<NET-ASSETS> 59,286,277
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,568,586
<OTHER-INCOME> 0
<EXPENSES-NET> (184,818)
<NET-INVESTMENT-INCOME> 1,383,768
<REALIZED-GAINS-CURRENT> 280,983
<APPREC-INCREASE-CURRENT> (1,536,686)
<NET-CHANGE-FROM-OPS> 128,065
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,360,942)
<DISTRIBUTIONS-OF-GAINS> (1,699,634)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 462,050
<NUMBER-OF-SHARES-REDEEMED> (499,530)
<SHARES-REINVESTED> 125,651
<NET-CHANGE-IN-ASSETS> (1,975,756)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1,997,024
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (105,462)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (186,629)
<AVERAGE-NET-ASSETS> 60,429,608
<PER-SHARE-NAV-BEGIN> 11.25
<PER-SHARE-NII> .25
<PER-SHARE-GAIN-APPREC> (.23)
<PER-SHARE-DIVIDEND> (.25)
<PER-SHARE-DISTRIBUTIONS> (.31)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.71
<EXPENSE-RATIO> .62
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Multi-State Municipal Series Trust
Massachusetts Series Semi-Annual
</LEGEND>
<CIK> 0000869427
<NAME> MSDW MULTI-STATE MUNICIPAL SERIES TRUST
<SERIES>
<NUMBER> 4
<NAME> MASSACHUSETTS SERIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-1999
<PERIOD-END> MAY-31-1999
<INVESTMENTS-AT-COST> 13,825,097
<INVESTMENTS-AT-VALUE> 14,547,628
<RECEIVABLES> 271,884
<ASSETS-OTHER> 132,743
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 14,952,255
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (44,787)
<TOTAL-LIABILITIES> (44,787)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 14,158,502
<SHARES-COMMON-STOCK> 1,353,294
<SHARES-COMMON-PRIOR> 1,344,198
<ACCUMULATED-NII-CURRENT> 5,561
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 20,874
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 722,531
<NET-ASSETS> 14,907,468
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 402,649
<OTHER-INCOME> 0
<EXPENSES-NET> (60,306)
<NET-INVESTMENT-INCOME> 342,343
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> (284,247)
<NET-CHANGE-FROM-OPS> 58,096
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (336,782)
<DISTRIBUTIONS-OF-GAINS> (150,193)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 52,888
<NUMBER-OF-SHARES-REDEEMED> (70,472)
<SHARES-REINVESTED> 26,680
<NET-CHANGE-IN-ASSETS> (328,622)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 171,067
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (26,331)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (60,922)
<AVERAGE-NET-ASSETS> 15,087,843
<PER-SHARE-NAV-BEGIN> 11.33
<PER-SHARE-NII> .26
<PER-SHARE-GAIN-APPREC> (.21)
<PER-SHARE-DIVIDEND> (.25)
<PER-SHARE-DISTRIBUTIONS> (.11)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.02
<EXPENSE-RATIO> .81
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Multi-State Municipal Series Trust
Michigan Series Semi-Annual
</LEGEND>
<CIK> 0000869427
<NAME> MSDW MULTI-STATE MUNICIPAL SERIES TRUST
<SERIES>
<NUMBER> 5
<NAME> MICHIGAN SERIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-1999
<PERIOD-END> MAY-31-1999
<INVESTMENTS-AT-COST> 16,820,477
<INVESTMENTS-AT-VALUE> 17,425,953
<RECEIVABLES> 252,331
<ASSETS-OTHER> 4,639
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 17,682,923
<PAYABLE-FOR-SECURITIES> (530,183)
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (21,747)
<TOTAL-LIABILITIES> (551,930)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 16,743,031
<SHARES-COMMON-STOCK> 1,620,312
<SHARES-COMMON-PRIOR> 1,587,214
<ACCUMULATED-NII-CURRENT> 6,225
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 116,947
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 605,476
<NET-ASSETS> 17,201,679
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 460,999
<OTHER-INCOME> 0
<EXPENSES-NET> (69,099)
<NET-INVESTMENT-INCOME> 391,900
<REALIZED-GAINS-CURRENT> 77,460
<APPREC-INCREASE-CURRENT> (348,269)
<NET-CHANGE-FROM-OPS> 121,091
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (385,675)
<DISTRIBUTIONS-OF-GAINS> (654,782)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 88,728
<NUMBER-OF-SHARES-REDEEMED> (121,683)
<SHARES-REINVESTED> 66,053
<NET-CHANGE-IN-ASSETS> 33,098
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 694,269
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (30,643)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (69,860)
<AVERAGE-NET-ASSETS> 17,558,421
<PER-SHARE-NAV-BEGIN> 11.19
<PER-SHARE-NII> .24
<PER-SHARE-GAIN-APPREC> (.16)
<PER-SHARE-DIVIDEND> (.24)
<PER-SHARE-DISTRIBUTIONS> (.41)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.62
<EXPENSE-RATIO> .80
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Multi-State Municipal Series Trust
Minnesota Series Semi-Annual
</LEGEND>
<CIK> 0000869427
<NAME> MSDW MULTI-STATE MUNICIPAL SERIES TRUST
<SERIES>
<NUMBER> 6
<NAME> MINNESOTA SERIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-1999
<PERIOD-END> MAY-31-1999
<INVESTMENTS-AT-COST> 7,657,880
<INVESTMENTS-AT-VALUE> 7,916,482
<RECEIVABLES> 126,215
<ASSETS-OTHER> 46,547
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 8,089,244
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (14,593)
<TOTAL-LIABILITIES> (14,593)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7,791,561
<SHARES-COMMON-STOCK> 765,732
<SHARES-COMMON-PRIOR> 778,036
<ACCUMULATED-NII-CURRENT> 2,812
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 21,676
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 258,602
<NET-ASSETS> 8,074,651
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 217,022
<OTHER-INCOME> 0
<EXPENSES-NET> (42,246)
<NET-INVESTMENT-INCOME> 174,776
<REALIZED-GAINS-CURRENT> 21,677
<APPREC-INCREASE-CURRENT> (164,221)
<NET-CHANGE-FROM-OPS> 32,232
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (171,964)
<DISTRIBUTIONS-OF-GAINS> (71,136)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 50,305
<NUMBER-OF-SHARES-REDEEMED> (74,190)
<SHARES-REINVESTED> 11,581
<NET-CHANGE-IN-ASSETS> (342,017)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 71,135
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (14,566)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 42,742
<AVERAGE-NET-ASSETS> 8,345,956
<PER-SHARE-NAV-BEGIN> 10.82
<PER-SHARE-NII> .22
<PER-SHARE-GAIN-APPREC> (.18)
<PER-SHARE-DIVIDEND> (.22)
<PER-SHARE-DISTRIBUTIONS> (.09)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.55
<EXPENSE-RATIO> 1.03
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Multi-State Municipal Series Trust
New Jersey Series Semi-Annual
</LEGEND>
<CIK> 0000869427
<NAME> MSDW MULTI-STATE MUNICIPAL SERIES
<SERIES>
<NUMBER> 7
<NAME> NEW JERSEY SERIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-1999
<PERIOD-END> MAY-31-1999
<INVESTMENTS-AT-COST> 38,673,602
<INVESTMENTS-AT-VALUE> 40,544,398
<RECEIVABLES> 840,255
<ASSETS-OTHER> 4,606
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 41,389,259
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (51,933)
<TOTAL-LIABILITIES> (51,933)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 39,146,182
<SHARES-COMMON-STOCK> 3,803,691
<SHARES-COMMON-PRIOR> 3,750,154
<ACCUMULATED-NII-CURRENT> 15,953
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 304,395
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,870,796
<NET-ASSETS> 41,337,326
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,108,977
<OTHER-INCOME> 0
<EXPENSES-NET> (139,580)
<NET-INVESTMENT-INCOME> 969,397
<REALIZED-GAINS-CURRENT> 51,868
<APPREC-INCREASE-CURRENT> (771,646)
<NET-CHANGE-FROM-OPS> 249,619
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (953,444)
<DISTRIBUTIONS-OF-GAINS> (356,974)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 192,119
<NUMBER-OF-SHARES-REDEEMED> (209,985)
<SHARES-REINVESTED> 71,403
<NET-CHANGE-IN-ASSETS> (465,686)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 609,501
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (72,927)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (140,781)
<AVERAGE-NET-ASSETS> 41,787,305
<PER-SHARE-NAV-BEGIN> 11.15
<PER-SHARE-NII> .25
<PER-SHARE-GAIN-APPREC> (.18)
<PER-SHARE-DIVIDEND> (.25)
<PER-SHARE-DISTRIBUTIONS> (.10)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.87
<EXPENSE-RATIO> .68
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Multi-State Municipal Trust Series
New York Series Semi-Annual
</LEGEND>
<CIK> 0000869427
<NAME> MSDW MULTI-STATE MUNICIPAL SERIES TRUST
<SERIES>
<NUMBER> 8
<NAME> NEW YORK SERIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-1999
<PERIOD-END> MAY-31-1999
<INVESTMENTS-AT-COST> 10,739,209
<INVESTMENTS-AT-VALUE> 11,362,067
<RECEIVABLES> 193,211
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 11,723
<TOTAL-ASSETS> 11,667,001
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (33,842)
<TOTAL-LIABILITIES> (33,842)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 10,983,020
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<SHARES-COMMON-PRIOR> 1,053,134
<ACCUMULATED-NII-CURRENT> 4,265
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 23,016
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 622,858
<NET-ASSETS> 11,633,159
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 317,160
<OTHER-INCOME> 0
<EXPENSES-NET> (52,247)
<NET-INVESTMENT-INCOME> 264,913
<REALIZED-GAINS-CURRENT> 9,873
<APPREC-INCREASE-CURRENT> (228,525)
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<EQUALIZATION> 0
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<DISTRIBUTIONS-OF-GAINS> (381,599)
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<NUMBER-OF-SHARES-REDEEMED> (61,007)
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<NET-CHANGE-IN-ASSETS> (380,169)
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</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Multi-State Municipal Series Trust
Ohio Series Semi-Annual
</LEGEND>
<CIK> 0000869427
<NAME> MSDW MULTI-STATE MUNICIPAL SERIES TRUST
<SERIES>
<NUMBER> 9
<NAME> OHIO SERIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-1999
<PERIOD-END> MAY-31-1999
<INVESTMENTS-AT-COST> 16,597,407
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<ACCUMULATED-NET-GAINS> 25,555
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 720,517
<NET-ASSETS> 17,698,180
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<NET-INVESTMENT-INCOME> 425,817
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<EQUALIZATION> 0
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<DISTRIBUTIONS-OF-GAINS> (219,843)
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<NUMBER-OF-SHARES-SOLD> 102,444
<NUMBER-OF-SHARES-REDEEMED> (168,676)
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<NET-CHANGE-IN-ASSETS> (882,126)
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<PER-SHARE-NII> .25
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<PER-SHARE-DISTRIBUTIONS> (.13)
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<PER-SHARE-NAV-END> 10.82
<EXPENSE-RATIO> .76
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Multi-State Municipal Series Trust
Pennsylvania Series Semi-Annual
</LEGEND>
<CIK> 0000869427
<NAME> MSDW MULTI-STATE MUNICIPAL SERIES TRUST
<SERIES>
<NUMBER> 10
<NAME> PENNSYLVANIA SERIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-1999
<PERIOD-END> MAY-31-1999
<INVESTMENTS-AT-COST> 51,245,032
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<RECEIVABLES> 907,635
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<OTHER-ITEMS-LIABILITIES> (79,424)
<TOTAL-LIABILITIES> (79,424)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 51,965,237
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<SHARES-COMMON-PRIOR> 4,827,264
<ACCUMULATED-NII-CURRENT> 21,134
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<ACCUMULATED-NET-GAINS> 91,457
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,698,198
<NET-ASSETS> 53,776,026
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<INTEREST-INCOME> 1,442,598
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<EXPENSES-NET> (166,823)
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<NUMBER-OF-SHARES-REDEEMED> (255,585)
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<ACCUMULATED-NII-PRIOR> 21,134
<ACCUMULATED-GAINS-PRIOR> 578,722
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<GROSS-ADVISORY-FEES> (94,177)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (168,481)
<AVERAGE-NET-ASSETS> 53,963,025
<PER-SHARE-NAV-BEGIN> 11.15
<PER-SHARE-NII> .26
<PER-SHARE-GAIN-APPREC> .03
<PER-SHARE-DIVIDEND> (.26)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.18
<EXPENSE-RATIO> .63
</TABLE>
