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<PAGE> PAGE 2
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<PAGE> PAGE 4
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<PAGE> PAGE 6
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<PAGE> PAGE 9
SIGNATURE THOMAS G. ROSE
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>001
<NAME> SELIGMAN PENNSYLVANIA MUNICIPAL FUND CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> MAR-31-1999
<INVESTMENTS-AT-COST> 28104
<INVESTMENTS-AT-VALUE> 29939
<RECEIVABLES> 429
<ASSETS-OTHER> 127
<OTHER-ITEMS-ASSETS> 0
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<PAYABLE-FOR-SECURITIES> 0
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<TOTAL-LIABILITIES> 1407
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 27168
<SHARES-COMMON-STOCK> 3529<F1>
<SHARES-COMMON-PRIOR> 3592<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 85
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1835
<NET-ASSETS> 28151<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 774<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (177)<F1>
<NET-INVESTMENT-INCOME> 597<F1>
<REALIZED-GAINS-CURRENT> 91
<APPREC-INCREASE-CURRENT> (497)
<NET-CHANGE-FROM-OPS> 204
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (596)<F1>
<DISTRIBUTIONS-OF-GAINS> (531)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 41<F1>
<NUMBER-OF-SHARES-REDEEMED> (189)<F1>
<SHARES-REINVESTED> 85<F1>
<NET-CHANGE-IN-ASSETS> (1101)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 85
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
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<PER-SHARE-NAV-BEGIN> 8.24<F1>
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<PER-SHARE-GAIN-APPREC> (.11)<F1>
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<PER-SHARE-DISTRIBUTIONS> (.15)<F1>
<RETURNS-OF-CAPITAL> 0
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<EXPENSE-RATIO> 1.23<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class A only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>004
<NAME> SELIGMAN PENNSYLVANIA MUNICIPAL FUND CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> MAR-31-1999
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<SHARES-COMMON-PRIOR> 74<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
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<OVERDISTRIBUTION-GAINS> 0
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<NET-ASSETS> 937<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 21<F1>
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<EXPENSES-NET> (8)<F1>
<NET-INVESTMENT-INCOME> 13<F1>
<REALIZED-GAINS-CURRENT> 91
<APPREC-INCREASE-CURRENT> (497)
<NET-CHANGE-FROM-OPS> 204
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (14)<F1>
<DISTRIBUTIONS-OF-GAINS> (14)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 57<F1>
<NUMBER-OF-SHARES-REDEEMED> (15)<F1>
<SHARES-REINVESTED> 2<F1>
<NET-CHANGE-IN-ASSETS> (1101)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 85
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 8<F1>
<AVERAGE-NET-ASSETS> 810<F1>
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<PER-SHARE-NII> .14<F1>
<PER-SHARE-GAIN-APPREC> (.11)<F1>
<PER-SHARE-DIVIDEND> (.14)<F1>
<PER-SHARE-DISTRIBUTIONS> (.15)<F1>
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<EXPENSE-RATIO> 1.98<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
