<PAGE> PAGE 1
000 A000000 03/31/95
000 C000000 0000893968
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 Y
000 H000000 N
000 I000000 3.0
000 J000000 U
001 A000000 PIONEER TAX-FREE STATE SERIES TRUST
001 B000000 811-7336
001 C000000 6177427825
002 A000000 60 STATE STREET
002 B000000 BOSTON
002 C000000 MA
002 D010000 02109
002 D020000 1820
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 3
007 C010100 1
007 C020100 PIONEER CALIFORNIA DOUBLE TAX-FREE FUND
007 C030100 N
007 C010200 2
007 C020200 PIONEER NEW YORK TRIPLE TAX-FREE FUND
007 C030200 N
007 C010300 3
007 C020300 PIONEER MASSACHUSETTS DOUBLE TAX-FREE FUND
007 C030300 N
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
077 A000000 Y
077 Q010000 Y
078 000000 N
062 A000100 Y
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062 C000100 0.0
062 D000100 0.0
062 E000100 2.9
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062 G000100 0.0
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<PAGE> PAGE 2
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062 K000100 0.0
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062 M000100 0.0
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062 O000100 97.1
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071 A000100 1255
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062 A000200 Y
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071 A000200 1017
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<PAGE> PAGE 3
062 G000300 0.0
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SIGNATURE WILLIAM H. KEOUGH
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000893968
<NAME> Pioneer Tax-Free State Series Trust
<SERIES>
<NUMBER> 0
<NAME> Pioneer New York Triple Tax-Free Fund
<MULTIPLIER> 1
<CURRENCY> U. S .Dollars
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> SEP-30-1994
<PERIOD-START> OCT-01-1994
<PERIOD-END> MAR-31-1995
<EXCHANGE-RATE> 1.00000
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<INVESTMENTS-AT-VALUE> 4,518,027
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<TOTAL-ASSETS> 4,771,039
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 43,069
<TOTAL-LIABILITIES> 43,069
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4,828,568
<SHARES-COMMON-STOCK> 440,678
<SHARES-COMMON-PRIOR> 400,750
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (60,278)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (40,320)
<NET-ASSETS> 4,727,970
<DIVIDEND-INCOME> 0
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<OTHER-INCOME> 0
<EXPENSES-NET> (10,900)
<NET-INVESTMENT-INCOME> 117,411
<REALIZED-GAINS-CURRENT> (58,388)
<APPREC-INCREASE-CURRENT> 230,676
<NET-CHANGE-FROM-OPS> 289,699
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (117,411)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 355,096
<NUMBER-OF-SHARES-REDEEMED> (223,838)
<SHARES-REINVESTED> 8,670
<NET-CHANGE-IN-ASSETS> 563,724
<ACCUMULATED-NII-PRIOR> 0
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<GROSS-ADVISORY-FEES> (13,079)
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<GROSS-EXPENSE> (71,181)
<AVERAGE-NET-ASSETS> 4,373,000
<PER-SHARE-NAV-BEGIN> 10.390
<PER-SHARE-NII> 0.270
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<PER-SHARE-DIVIDEND> (0.270)
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 10.730
<EXPENSE-RATIO> 0.250
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.000
</TABLE>
