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<PAGE> PAGE 2
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<PAGE> PAGE 3
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<PAGE> PAGE 7
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SIGNATURE THOMAS G. ROSE
TITLE REASURER
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 001
<NAME> SELIGMAN INCOME FUND, INC. CLASS A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 341968
<INVESTMENTS-AT-VALUE> 364215
<RECEIVABLES> 4226
<ASSETS-OTHER> 360
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 368801
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1381
<TOTAL-LIABILITIES> 1381
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 320169
<SHARES-COMMON-STOCK> 17929<F1>
<SHARES-COMMON-PRIOR> 18271<F1>
<ACCUMULATED-NII-CURRENT> (683)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 25688
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 22246
<NET-ASSETS> 273019<F1>
<DIVIDEND-INCOME> 5244<F1>
<INTEREST-INCOME> 1511<F1>
<OTHER-INCOME> 2<F1>
<EXPENSES-NET> (1478)<F1>
<NET-INVESTMENT-INCOME> 5279<F1>
<REALIZED-GAINS-CURRENT> 26674
<APPREC-INCREASE-CURRENT> (12599)
<NET-CHANGE-FROM-OPS> 20742
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (6047)<F1>
<DISTRIBUTIONS-OF-GAINS> (2339)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1141<F1>
<NUMBER-OF-SHARES-REDEEMED> (1886)<F1>
<SHARES-REINVESTED> 403<F1>
<NET-CHANGE-IN-ASSETS> 11931
<ACCUMULATED-NII-PRIOR> 406
<ACCUMULATED-GAINS-PRIOR> 2145
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 818<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1478<F1>
<AVERAGE-NET-ASSETS> 275095<F1>
<PER-SHARE-NAV-BEGIN> 14.81<F1>
<PER-SHARE-NII> 0.29<F1>
<PER-SHARE-GAIN-APPREC> 0.60<F1>
<PER-SHARE-DIVIDEND> (0.34)<F1>
<PER-SHARE-DISTRIBUTIONS> (0.13)<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 15.23<F1>
<EXPENSE-RATIO> 1.08<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> 002
<NAME> SELIGMAN INCOME FUND, INC. CLASS B
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 341968
<INVESTMENTS-AT-VALUE> 364215
<RECEIVABLES> 4226
<ASSETS-OTHER> 360
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 368801
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1381
<TOTAL-LIABILITIES> 1381
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 320169
<SHARES-COMMON-STOCK> 921<F1>
<SHARES-COMMON-PRIOR> 582<F1>
<ACCUMULATED-NII-CURRENT> (683)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 25688
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 22246
<NET-ASSETS> 13984<F1>
<DIVIDEND-INCOME> 216<F1>
<INTEREST-INCOME> 59<F1>
<OTHER-INCOME> 0<F1>
<EXPENSES-NET> (102)<F1>
<NET-INVESTMENT-INCOME> 173<F1>
<REALIZED-GAINS-CURRENT> 26674
<APPREC-INCREASE-CURRENT> (12599)
<NET-CHANGE-FROM-OPS> 20742
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (231)<F1>
<DISTRIBUTIONS-OF-GAINS> (118)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 386<F1>
<NUMBER-OF-SHARES-REDEEMED> (64)<F1>
<SHARES-REINVESTED> 17<F1>
<NET-CHANGE-IN-ASSETS> 11931
<ACCUMULATED-NII-PRIOR> 406
<ACCUMULATED-GAINS-PRIOR> 2145
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 34<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 102<F1>
<AVERAGE-NET-ASSETS> 11193<F1>
<PER-SHARE-NAV-BEGIN> 14.79<F1>
<PER-SHARE-NII> 0.23<F1>
<PER-SHARE-GAIN-APPREC> 0.59<F1>
<PER-SHARE-DIVIDEND> (0.29)<F1>
<PER-SHARE-DISTRIBUTIONS> (0.13)<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 15.19<F1>
<EXPENSE-RATIO> 1.84<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class B only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 004
<NAME> SELIGMAN INCOME FUND, INC. CLASS D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 341968
<INVESTMENTS-AT-VALUE> 364215
<RECEIVABLES> 4226
<ASSETS-OTHER> 360
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 368801
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1381
<TOTAL-LIABILITIES> 1381
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 320169
<SHARES-COMMON-STOCK> 5297<F1>
<SHARES-COMMON-PRIOR> 5155<F1>
<ACCUMULATED-NII-CURRENT> (683)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 25688
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 22246
<NET-ASSETS> 80417<F1>
<DIVIDEND-INCOME> 1495<F1>
<INTEREST-INCOME> 437<F1>
<OTHER-INCOME> 0<F1>
<EXPENSES-NET> (717)<F1>
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<REALIZED-GAINS-CURRENT> 26674
<APPREC-INCREASE-CURRENT> (12599)
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<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1478)<F1>
<DISTRIBUTIONS-OF-GAINS> (674)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 688<F1>
<NUMBER-OF-SHARES-REDEEMED> (665)<F1>
<SHARES-REINVESTED> 119<F1>
<NET-CHANGE-IN-ASSETS> 11931
<ACCUMULATED-NII-PRIOR> 406
<ACCUMULATED-GAINS-PRIOR> 2145
<OVERDISTRIB-NII-PRIOR> 0
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<GROSS-ADVISORY-FEES> 234<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 717<F1>
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<F1>Class D only. All other data are fund level.
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