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<PAGE> PAGE 22
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<PAGE> PAGE 23
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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 U001000 0
072 V001000 0
072 W001000 2
072 X001000 469
072 Y001000 0
072 Z001000 2392
072AA001000 794
072BB001000 1
072CC011000 985
072CC021000 0
072DD011000 2377
072DD021000 15
072EE001000 441
073 A011000 0.3617
073 A021000 0.2910
073 B001000 0.0650
073 C001000 0.0000
074 A001000 10
074 B001000 0
074 C001000 800
074 D001000 48792
074 E001000 0
074 F001000 0
074 G001000 0
074 H001000 0
074 I001000 0
074 J001000 0
074 K001000 7
074 L001000 962
074 M001000 1
074 N001000 50572
074 O001000 0
074 P001000 27
074 Q001000 0
074 R011000 0
074 R021000 0
074 R031000 0
074 R041000 178
074 S001000 0
074 T001000 50367
074 U011000 6223
074 U021000 52
074 V011000 8.03
074 V021000 8.03
074 W001000 0.0000
074 X001000 1301
074 Y001000 0
075 A001000 0
<PAGE> PAGE 43
075 B001000 52039
076 001000 0.00
028 A011100 664
028 A021100 151
028 A031100 0
028 A041100 702
028 B011100 474
028 B021100 126
028 B031100 0
028 B041100 427
028 C011100 555
028 C021100 138
028 C031100 0
028 C041100 545
028 D011100 347
028 D021100 143
028 D031100 0
028 D041100 239
028 E011100 455
028 E021100 126
028 E031100 0
028 E041100 383
028 F011100 1461
028 F021100 135
028 F031100 0
028 F041100 672
028 G011100 3956
028 G021100 819
028 G031100 0
028 G041100 2968
028 H001100 1878
029 001100 Y
030 A001100 137
030 B001100 4.75
030 C001100 0.00
031 A001100 15
031 B001100 0
032 001100 122
033 001100 0
034 001100 Y
035 001100 0
036 A001100 N
036 B001100 0
042 A001100 0
042 B001100 0
042 C001100 0
042 D001100 100
042 E001100 0
042 F001100 0
042 G001100 0
042 H001100 0
<PAGE> PAGE 44
043 001100 72
044 001100 0
055 A001100 N
055 B001100 N
056 001100 Y
057 001100 N
062 A001100 Y
062 B001100 0.0
062 C001100 0.0
062 D001100 0.0
062 E001100 5.1
062 F001100 0.0
062 G001100 0.0
062 H001100 0.0
062 I001100 0.0
062 J001100 0.0
062 K001100 0.0
062 L001100 -1.6
062 M001100 0.0
062 N001100 0.0
062 O001100 96.5
062 P001100 0.0
062 Q001100 0.0
062 R001100 0.0
063 A001100 0
063 B001100 18.0
064 A001100 Y
064 B001100 N
070 A011100 Y
070 A021100 N
070 B011100 N
070 B021100 N
070 C011100 N
070 C021100 N
070 D011100 N
070 D021100 N
070 E011100 N
070 E021100 N
070 F011100 N
070 F021100 N
070 G011100 N
070 G021100 N
070 H011100 N
070 H021100 N
070 I011100 N
070 I021100 N
070 J011100 Y
070 J021100 N
070 K011100 N
070 K021100 N
070 L011100 N
<PAGE> PAGE 45
070 L021100 N
070 M011100 N
070 M021100 N
070 N011100 N
070 N021100 N
070 O011100 N
070 O021100 N
070 P011100 Y
070 P021100 Y
070 Q011100 N
070 Q021100 N
070 R011100 N
070 R021100 N
071 A001100 7560
071 B001100 7065
071 C001100 56002
071 D001100 13
072 A001100 12
072 B001100 3154
072 C001100 0
072 D001100 0
072 E001100 0
072 F001100 288
072 G001100 0
072 H001100 0
072 I001100 77
072 J001100 13
072 K001100 6
072 L001100 10
072 M001100 5
072 N001100 11
072 O001100 1
072 P001100 0
072 Q001100 0
072 R001100 33
072 S001100 7
072 T001100 72
072 U001100 0
072 V001100 0
072 W001100 2
072 X001100 525
072 Y001100 0
072 Z001100 2629
072AA001100 376
072BB001100 0
072CC011100 1637
072CC021100 0
072DD011100 2556
072DD021100 73
072EE001100 722
073 A011100 0.3639
<PAGE> PAGE 46
073 A021100 0.2918
073 B001100 0.1000
073 C001100 0.0000
074 A001100 111
074 B001100 0
074 C001100 3100
074 D001100 58132
074 E001100 0
074 F001100 0
074 G001100 0
074 H001100 0
074 I001100 0
074 J001100 171
074 K001100 8
074 L001100 1070
074 M001100 1
074 N001100 62593
074 O001100 1967
074 P001100 30
074 Q001100 0
074 R011100 0
074 R021100 0
074 R031100 0
074 R041100 344
074 S001100 0
074 T001100 60252
074 U011100 7159
074 U021100 329
074 V011100 8.05
074 V021100 8.04
074 W001100 0.0000
074 X001100 1562
074 Y001100 0
075 A001100 0
075 B001100 57657
076 001100 0.00
028 A011300 172
028 A021300 136
028 A031300 0
028 A041300 1183
028 B011300 952
028 B021300 113
028 B031300 0
028 B041300 497
028 C011300 101
028 C021300 125
028 C031300 0
028 C041300 382
028 D011300 97
028 D021300 130
028 D031300 0
<PAGE> PAGE 47
028 D041300 206
028 E011300 291
028 E021300 116
028 E031300 0
028 E041300 219
028 F011300 186
028 F021300 126
028 F031300 0
028 F041300 216
028 G011300 1799
028 G021300 746
028 G031300 0
028 G041300 2703
028 H001300 663
029 001300 Y
030 A001300 59
030 B001300 4.75
030 C001300 0.00
031 A001300 7
031 B001300 0
032 001300 50
033 001300 2
034 001300 Y
035 001300 26
036 A001300 N
036 B001300 0
042 A001300 0
042 B001300 0
042 C001300 0
042 D001300 100
042 E001300 0
042 F001300 0
042 G001300 0
042 H001300 0
043 001300 72
044 001300 0
055 A001300 Y
055 B001300 N
056 001300 Y
057 001300 N
062 A001300 Y
062 B001300 0.0
062 C001300 0.0
062 D001300 0.0
062 E001300 1.9
062 F001300 0.0
062 G001300 0.0
062 H001300 0.0
062 I001300 0.0
062 J001300 0.0
062 K001300 0.0
<PAGE> PAGE 48
062 L001300 1.5
062 M001300 0.0
062 N001300 0.0
062 O001300 96.6
062 P001300 0.0
062 Q001300 0.0
062 R001300 0.0
063 A001300 0
063 B001300 18.6
064 A001300 Y
064 B001300 N
070 A011300 Y
070 A021300 N
070 B011300 N
070 B021300 N
070 C011300 N
070 C021300 N
070 D011300 N
070 D021300 N
070 E011300 N
070 E021300 N
070 F011300 N
070 F021300 N
070 G011300 N
070 G021300 N
070 H011300 N
070 H021300 N
070 I011300 N
070 I021300 N
070 J011300 Y
070 J021300 N
070 K011300 N
070 K021300 N
070 L011300 N
070 L021300 N
070 M011300 N
070 M021300 N
070 N011300 N
070 N021300 N
070 O011300 N
070 O021300 N
070 P011300 Y
070 P021300 Y
070 Q011300 N
070 Q021300 N
070 R011300 N
070 R021300 N
071 A001300 1442
071 B001300 5205
071 C001300 49376
071 D001300 3
<PAGE> PAGE 49
072 A001300 12
072 B001300 2764
072 C001300 0
072 D001300 0
072 E001300 0
072 F001300 253
072 G001300 0
072 H001300 0
072 I001300 70
072 J001300 9
072 K001300 5
072 L001300 11
072 M001300 5
072 N001300 12
072 O001300 1
072 P001300 0
072 Q001300 0
072 R001300 33
072 S001300 4
072 T001300 72
072 U001300 0
072 V001300 0
072 W001300 2
072 X001300 477
072 Y001300 0
072 Z001300 2287
072AA001300 364
072BB001300 9
072CC011300 1484
072CC021300 0
072DD011300 2185
072DD021300 102
072EE001300 198
073 A011300 0.3748
073 A021300 0.0000
073 B001300 0.0320
073 C001300 0.0000
074 A001300 123
074 B001300 0
074 C001300 1000
074 D001300 49476
074 E001300 0
074 F001300 0
074 G001300 0
074 H001300 0
074 I001300 0
074 J001300 0
074 K001300 7
074 L001300 786
074 M001300 1
074 N001300 51393
<PAGE> PAGE 50
074 O001300 0
074 P001300 26
074 Q001300 0
074 R011300 0
074 R021300 0
074 R031300 0
074 R041300 134
074 S001300 0
074 T001300 51233
074 U011300 5777
074 U021300 334
074 V011300 8.38
074 V021300 8.40
074 W001300 0.0000
074 X001300 1081
074 Y001300 0
075 A001300 0
075 B001300 50676
076 001300 0.00
028 A011500 920
028 A021500 272
028 A031500 0
028 A041500 1346
028 B011500 1045
028 B021500 226
028 B031500 0
028 B041500 792
028 C011500 564
028 C021500 250
028 C031500 0
028 C041500 1088
028 D011500 584
028 D021500 257
028 D031500 0
028 D041500 1039
028 E011500 549
028 E021500 230
028 E031500 0
028 E041500 1438
028 F011500 885
028 F021500 240
028 F031500 0
028 F041500 303
028 G011500 4547
028 G021500 1475
028 G031500 0
028 G041500 6006
028 H001500 1745
029 001500 Y
030 A001500 195
030 B001500 4.75
<PAGE> PAGE 51
030 C001500 0.00
031 A001500 24
031 B001500 0
032 001500 151
033 001500 20
034 001500 Y
035 001500 3
036 A001500 N
036 B001500 0
042 A001500 0
042 B001500 0
042 C001500 0
042 D001500 100
042 E001500 0
042 F001500 0
042 G001500 0
042 H001500 0
043 001500 143
044 001500 0
055 A001500 Y
055 B001500 N
056 001500 Y
057 001500 N
062 A001500 Y
062 B001500 0.0
062 C001500 0.0
062 D001500 0.0
062 E001500 1.8
062 F001500 0.0
062 G001500 0.0
062 H001500 0.0
062 I001500 0.0
062 J001500 0.0
062 K001500 0.0
062 L001500 0.7
062 M001500 0.0
062 N001500 0.0
062 O001500 97.5
062 P001500 0.0
062 Q001500 0.0
062 R001500 0.0
063 A001500 0
063 B001500 20.7
064 A001500 Y
064 B001500 N
070 A011500 Y
070 A021500 N
070 B011500 N
070 B021500 N
070 C011500 N
070 C021500 N
<PAGE> PAGE 52
070 D011500 N
070 D021500 N
070 E011500 N
070 E021500 N
070 F011500 N
070 F021500 N
070 G011500 N
070 G021500 N
070 H011500 N
070 H021500 N
070 I011500 N
070 I021500 N
070 J011500 Y
070 J021500 N
070 K011500 N
070 K021500 N
070 L011500 N
070 L021500 N
070 M011500 N
070 M021500 N
070 N011500 N
070 N021500 N
070 O011500 N
070 O021500 N
070 P011500 Y
070 P021500 N
070 Q011500 N
070 Q021500 N
070 R011500 N
070 R021500 N
071 A001500 20757
071 B001500 17567
071 C001500 105607
071 D001500 17
072 A001500 12
072 B001500 5981
072 C001500 0
072 D001500 0
072 E001500 0
072 F001500 540
072 G001500 0
072 H001500 0
072 I001500 138
072 J001500 14
072 K001500 4
072 L001500 8
072 M001500 6
072 N001500 11
072 O001500 1
072 P001500 0
072 Q001500 0
<PAGE> PAGE 53
072 R001500 33
072 S001500 3
072 T001500 143
072 U001500 0
072 V001500 0
072 W001500 5
072 X001500 906
072 Y001500 0
072 Z001500 5075
072AA001500 1214
072BB001500 0
072CC011500 2639
072CC021500 0
072DD011500 4906
072DD021500 169
072EE001500 940
073 A011500 0.3900
073 A021500 0.3151
073 B001500 0.0740
073 C001500 0.0000
074 A001500 97
074 B001500 0
074 C001500 800
074 D001500 109111
074 E001500 0
074 F001500 0
074 G001500 0
074 H001500 0
074 I001500 0
074 J001500 0
074 K001500 14
074 L001500 2209
074 M001500 2
074 N001500 112233
074 O001500 0
074 P001500 55
074 Q001500 0
074 R011500 0
074 R021500 0
074 R031500 0
074 R041500 256
074 S001500 0
074 T001500 111922
074 U011500 12682
074 U021500 668
074 V011500 8.38
074 V021500 8.38
074 W001500 0.0000
074 X001500 2091
074 Y001500 0
075 A001500 0
<PAGE> PAGE 54
075 B001500 107922
076 001500 0.00
SIGNATURE THOMAS G. ROSE
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>011
<NAME> SELIGMAN MUNICIPAL FUND SERIES-NATIONAL CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 100248
<INVESTMENTS-AT-VALUE> 107999
<RECEIVABLES> 1693
<ASSETS-OTHER> 124
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 109817
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 516
<TOTAL-LIABILITIES> 516
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 103109
<SHARES-COMMON-STOCK> 12255<F1>
<SHARES-COMMON-PRIOR> 12169<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1559)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7751
<NET-ASSETS> 101909<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 5571<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (797)<F1>
<NET-INVESTMENT-INCOME> 4774<F1>
<REALIZED-GAINS-CURRENT> 1376
<APPREC-INCREASE-CURRENT> 2557
<NET-CHANGE-FROM-OPS> 8929
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (4774)<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1739<F1>
<NUMBER-OF-SHARES-REDEEMED> (1975)<F1>
<SHARES-REINVESTED> 322<F1>
<NET-CHANGE-IN-ASSETS> 9541
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (2935)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 494<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 797<F1>
<AVERAGE-NET-ASSETS> 98854<F1>
<PER-SHARE-NAV-BEGIN> 8.01<F1>
<PER-SHARE-NII> .39<F1>
<PER-SHARE-GAIN-APPREC> .31<F1>
<PER-SHARE-DIVIDEND> (.39)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.32<F1>
<EXPENSE-RATIO> .80<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>014
<NAME> SELIGMAN MUNICIPAL FUND SERIES-NATIONAL CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 100248
<INVESTMENTS-AT-VALUE> 107999
<RECEIVABLES> 1693
<ASSETS-OTHER> 124
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 109817
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 516
<TOTAL-LIABILITIES> 516
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 103109
<SHARES-COMMON-STOCK> 889<F1>
<SHARES-COMMON-PRIOR> 284<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1559)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7751
<NET-ASSETS> 7392<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 319<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (97)<F1>
<NET-INVESTMENT-INCOME> 222<F1>
<REALIZED-GAINS-CURRENT> 1376
<APPREC-INCREASE-CURRENT> 2557
<NET-CHANGE-FROM-OPS> 8929
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (222)<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2207<F1>
<NUMBER-OF-SHARES-REDEEMED> (1623)<F1>
<SHARES-REINVESTED> 21<F1>
<NET-CHANGE-IN-ASSETS> 9541
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (2935)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 28<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 97<F1>
<AVERAGE-NET-ASSETS> 5680<F1>
<PER-SHARE-NAV-BEGIN> 8.02<F1>
<PER-SHARE-NII> .32<F1>
<PER-SHARE-GAIN-APPREC> .29<F1>
<PER-SHARE-DIVIDEND> (.32)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.31<F1>
<EXPENSE-RATIO> 1.71<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>091
<NAME> SELIGMAN MUNICIPAL FUND SERIES - COLORADO CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 41913
<INVESTMENTS-AT-VALUE> 45174
<RECEIVABLES> 842
<ASSETS-OTHER> 78
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 46095
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 168
<TOTAL-LIABILITIES> 168
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 42782
<SHARES-COMMON-STOCK> 5968<F1>
<SHARES-COMMON-PRIOR> 6707<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (116)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3261
<NET-ASSETS> 45583<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2687<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (423)<F1>
<NET-INVESTMENT-INCOME> 2264<F1>
<REALIZED-GAINS-CURRENT> 1217
<APPREC-INCREASE-CURRENT> (134)
<NET-CHANGE-FROM-OPS> 3625
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2264)<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 466<F1>
<NUMBER-OF-SHARES-REDEEMED> (1374)<F1>
<SHARES-REINVESTED> 169<F1>
<NET-CHANGE-IN-ASSETS> (4091)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (1333)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 236<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 423<F1>
<AVERAGE-NET-ASSETS> 47111<F1>
<PER-SHARE-NAV-BEGIN> 7.42<F1>
<PER-SHARE-NII> .36<F1>
<PER-SHARE-GAIN-APPREC> .22<F1>
<PER-SHARE-DIVIDEND> (.36)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.64<F1>
<EXPENSE-RATIO> .90<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>094
<NAME> SELIGMAN MUNICIPAL FUND SERIES - COLORADO CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 41913
<INVESTMENTS-AT-VALUE> 45174
<RECEIVABLES> 842
<ASSETS-OTHER> 78
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 46095
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 168
<TOTAL-LIABILITIES> 168
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 42782
<SHARES-COMMON-STOCK> 45<F1>
<SHARES-COMMON-PRIOR> 32<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (116)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3261
<NET-ASSETS> 344<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 15<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (5)<F1>
<NET-INVESTMENT-INCOME> 10<F1>
<REALIZED-GAINS-CURRENT> 1217
<APPREC-INCREASE-CURRENT> (134)
<NET-CHANGE-FROM-OPS> 3625
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (10)<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 24<F1>
<NUMBER-OF-SHARES-REDEEMED> (12)<F1>
<SHARES-REINVESTED> 1<F1>
<NET-CHANGE-IN-ASSETS> (4091)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (1333)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5<F1>
<AVERAGE-NET-ASSETS> 266<F1>
<PER-SHARE-NAV-BEGIN> 7.42<F1>
<PER-SHARE-NII> .29<F1>
<PER-SHARE-GAIN-APPREC> .21<F1>
<PER-SHARE-DIVIDEND> (.29)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.63<F1>
<EXPENSE-RATIO> 1.80<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>131
<NAME> SELIGMAN MUNICIPAL FUND SERIES-GEORGIA CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 45876
<INVESTMENTS-AT-VALUE> 50476
<RECEIVABLES> 793
<ASSETS-OTHER> 123
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 51393
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 160
<TOTAL-LIABILITIES> 160
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 46366
<SHARES-COMMON-STOCK> 5777<F1>
<SHARES-COMMON-PRIOR> 6236<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 267
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4600
<NET-ASSETS> 48424<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2612<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (427)<F1>
<NET-INVESTMENT-INCOME> 2185<F1>
<REALIZED-GAINS-CURRENT> 356
<APPREC-INCREASE-CURRENT> 1483
<NET-CHANGE-FROM-OPS> 4126
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2185)<F1>
<DISTRIBUTIONS-OF-GAINS> (187)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 280<F1>
<NUMBER-OF-SHARES-REDEEMED> (930)<F1>
<SHARES-REINVESTED> 191<F1>
<NET-CHANGE-IN-ASSETS> (2021)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 109
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 239<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 427<F1>
<AVERAGE-NET-ASSETS> 47868<F1>
<PER-SHARE-NAV-BEGIN> 8.12<F1>
<PER-SHARE-NII> .38<F1>
<PER-SHARE-GAIN-APPREC> .29<F1>
<PER-SHARE-DIVIDEND> (.38)<F1>
<PER-SHARE-DISTRIBUTIONS> (.03)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.38<F1>
<EXPENSE-RATIO> .89<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>134
<NAME> SELIGMAN MUNICIPAL FUND SERIES-GEORGIA CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 45876
<INVESTMENTS-AT-VALUE> 50476
<RECEIVABLES> 793
<ASSETS-OTHER> 123
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 51393
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 160
<TOTAL-LIABILITIES> 160
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 46366
<SHARES-COMMON-STOCK> 334<F1>
<SHARES-COMMON-PRIOR> 324<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 267
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4600
<NET-ASSETS> 2809<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 152<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (50)<F1>
<NET-INVESTMENT-INCOME> 102<F1>
<REALIZED-GAINS-CURRENT> 356
<APPREC-INCREASE-CURRENT> 1483
<NET-CHANGE-FROM-OPS> 4126
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (102)<F1>
<DISTRIBUTIONS-OF-GAINS> (11)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 118<F1>
<NUMBER-OF-SHARES-REDEEMED> (120)<F1>
<SHARES-REINVESTED> 12<F1>
<NET-CHANGE-IN-ASSETS> (2021)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 109
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 14<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 50<F1>
<AVERAGE-NET-ASSETS> 2781<F1>
<PER-SHARE-NAV-BEGIN> 8.13<F1>
<PER-SHARE-NII> .30<F1>
<PER-SHARE-GAIN-APPREC> .30<F1>
<PER-SHARE-DIVIDEND> (.30)<F1>
<PER-SHARE-DISTRIBUTIONS> (.03)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.40<F1>
<EXPENSE-RATIO> 1.80<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>071
<NAME> SELIGMAN MUNICIPAL FUND SERIES-LOUISIANA CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 51764
<INVESTMENTS-AT-VALUE> 56033
<RECEIVABLES> 1222
<ASSETS-OTHER> 105
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 57361
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 216
<TOTAL-LIABILITIES> 216
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 52128
<SHARES-COMMON-STOCK> 6619<F1>
<SHARES-COMMON-PRIOR> 6790<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 748
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4269
<NET-ASSETS> 56308<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3223<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (491)<F1>
<NET-INVESTMENT-INCOME> 2732<F1>
<REALIZED-GAINS-CURRENT> 751
<APPREC-INCREASE-CURRENT> 905
<NET-CHANGE-FROM-OPS> 4411
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2732)<F1>
<DISTRIBUTIONS-OF-GAINS> (95)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 195<F1>
<NUMBER-OF-SHARES-REDEEMED> (537)<F1>
<SHARES-REINVESTED> 171<F1>
<NET-CHANGE-IN-ASSETS> 437
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 93
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 281<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 491<F1>
<AVERAGE-NET-ASSETS> 56175<F1>
<PER-SHARE-NAV-BEGIN> 8.28<F1>
<PER-SHARE-NII> .41<F1>
<PER-SHARE-GAIN-APPREC> .24<F1>
<PER-SHARE-DIVIDEND> (.41)<F1>
<PER-SHARE-DISTRIBUTIONS> (.01)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.51<F1>
<EXPENSE-RATIO> .88<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>074
<NAME> SELIGMAN MUNICIPAL FUND SERIES-LOUISIANA CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 51764
<INVESTMENTS-AT-VALUE> 56033
<RECEIVABLES> 1222
<ASSETS-OTHER> 105
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 57361
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 216
<TOTAL-LIABILITIES> 216
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 52128
<SHARES-COMMON-STOCK> 99<F1>
<SHARES-COMMON-PRIOR> 61<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 748
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4269
<NET-ASSETS> 837<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 33<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (10)<F1>
<NET-INVESTMENT-INCOME> 23<F1>
<REALIZED-GAINS-CURRENT> 751
<APPREC-INCREASE-CURRENT> 905
<NET-CHANGE-FROM-OPS> 4411
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (23)<F1>
<DISTRIBUTIONS-OF-GAINS> (1)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 39<F1>
<NUMBER-OF-SHARES-REDEEMED> (3)<F1>
<SHARES-REINVESTED> 2<F1>
<NET-CHANGE-IN-ASSETS> 437
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 93
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 10<F1>
<AVERAGE-NET-ASSETS> 581<F1>
<PER-SHARE-NAV-BEGIN> 8.27<F1>
<PER-SHARE-NII> .33<F1>
<PER-SHARE-GAIN-APPREC> .24<F1>
<PER-SHARE-DIVIDEND> (.33)<F1>
<PER-SHARE-DISTRIBUTIONS> (.01)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.50<F1>
<EXPENSE-RATIO> 1.78<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>081
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MARYLAND CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 52769
<INVESTMENTS-AT-VALUE> 57192
<RECEIVABLES> 946
<ASSETS-OTHER> 94
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 58233
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 214
<TOTAL-LIABILITIES> 214
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 53411
<SHARES-COMMON-STOCK> 6598<F1>
<SHARES-COMMON-PRIOR> 6452<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 185
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4423
<NET-ASSETS> 54891<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3005<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (465)<F1>
<NET-INVESTMENT-INCOME> 2540<F1>
<REALIZED-GAINS-CURRENT> 184
<APPREC-INCREASE-CURRENT> 1341
<NET-CHANGE-FROM-OPS> 4165
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2540)<F1>
<DISTRIBUTIONS-OF-GAINS> (307)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 489<F1>
<NUMBER-OF-SHARES-REDEEMED> (554)<F1>
<SHARES-REINVESTED> 211<F1>
<NET-CHANGE-IN-ASSETS> 3407
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 320
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 263<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 465<F1>
<AVERAGE-NET-ASSETS> 52620<F1>
<PER-SHARE-NAV-BEGIN> 8.14<F1>
<PER-SHARE-NII> .40<F1>
<PER-SHARE-GAIN-APPREC> .23<F1>
<PER-SHARE-DIVIDEND> (.40)<F1>
<PER-SHARE-DISTRIBUTIONS> (.05)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.32<F1>
<EXPENSE-RATIO> .89<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>084
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MARYLAND CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 52769
<INVESTMENTS-AT-VALUE> 57192
<RECEIVABLES> 946
<ASSETS-OTHER> 94
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 58233
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 214
<TOTAL-LIABILITIES> 214
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 53411
<SHARES-COMMON-STOCK> 375<F1>
<SHARES-COMMON-PRIOR> 253<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 185
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4423
<NET-ASSETS> 3128<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 146<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (46)<F1>
<NET-INVESTMENT-INCOME> 100<F1>
<REALIZED-GAINS-CURRENT> 184
<APPREC-INCREASE-CURRENT> 1341
<NET-CHANGE-FROM-OPS> 4165
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (100)<F1>
<DISTRIBUTIONS-OF-GAINS> (12)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 175<F1>
<NUMBER-OF-SHARES-REDEEMED> (64)<F1>
<SHARES-REINVESTED> 11<F1>
<NET-CHANGE-IN-ASSETS> 3407
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 320
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 13<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 46<F1>
<AVERAGE-NET-ASSETS> 2558<F1>
<PER-SHARE-NAV-BEGIN> 8.15<F1>
<PER-SHARE-NII> .32<F1>
<PER-SHARE-GAIN-APPREC> .23<F1>
<PER-SHARE-DIVIDEND> (.32)<F1>
<PER-SHARE-DISTRIBUTIONS> (.05)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.33<F1>
<EXPENSE-RATIO> 1.80<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>021
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MASSACHUSETTS CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 100144
<INVESTMENTS-AT-VALUE> 109394
<RECEIVABLES> 1656
<ASSETS-OTHER> 69
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 111121
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 325
<TOTAL-LIABILITIES> 325
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 101189
<SHARES-COMMON-STOCK> 13227<F1>
<SHARES-COMMON-PRIOR> 13766<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 357
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 9250
<NET-ASSETS> 109328<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 5965<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (866)<F1>
<NET-INVESTMENT-INCOME> 5099<F1>
<REALIZED-GAINS-CURRENT> 361
<APPREC-INCREASE-CURRENT> 4686
<NET-CHANGE-FROM-OPS> 10199
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (5099)<F1>
<DISTRIBUTIONS-OF-GAINS> (1288)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1656<F1>
<NUMBER-OF-SHARES-REDEEMED> (2696)<F1>
<SHARES-REINVESTED> 501<F1>
<NET-CHANGE-IN-ASSETS> (460)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1300
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 539<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 866<F1>
<AVERAGE-NET-ASSETS> 107960<F1>
<PER-SHARE-NAV-BEGIN> 7.99<F1>
<PER-SHARE-NII> .38<F1>
<PER-SHARE-GAIN-APPREC> .37<F1>
<PER-SHARE-DIVIDEND> (.38)<F1>
<PER-SHARE-DISTRIBUTIONS> (.09)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.27<F1>
<EXPENSE-RATIO> .80<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>024
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MASSACHUSETTS CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 100144
<INVESTMENTS-AT-VALUE> 109394
<RECEIVABLES> 1656
<ASSETS-OTHER> 69
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 111121
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 325
<TOTAL-LIABILITIES> 325
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 101189
<SHARES-COMMON-STOCK> 178<F1>
<SHARES-COMMON-PRIOR> 156<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 357
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 9250
<NET-ASSETS> 1468<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 76<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (23)<F1>
<NET-INVESTMENT-INCOME> 53<F1>
<REALIZED-GAINS-CURRENT> 361
<APPREC-INCREASE-CURRENT> 4686
<NET-CHANGE-FROM-OPS> 10199
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (53)<F1>
<DISTRIBUTIONS-OF-GAINS> (15)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 63<F1>
<NUMBER-OF-SHARES-REDEEMED> (45)<F1>
<SHARES-REINVESTED> 4<F1>
<NET-CHANGE-IN-ASSETS> (460)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1300
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 9<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 23<F1>
<AVERAGE-NET-ASSETS> 1369<F1>
<PER-SHARE-NAV-BEGIN> 7.99<F1>
<PER-SHARE-NII> .31<F1>
<PER-SHARE-GAIN-APPREC> .36<F1>
<PER-SHARE-DIVIDEND> (.31)<F1>
<PER-SHARE-DISTRIBUTIONS> (.09)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.26<F1>
<EXPENSE-RATIO> 1.71<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>031
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MICHIGAN CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 133068
<INVESTMENTS-AT-VALUE> 143945
<RECEIVABLES> 2550
<ASSETS-OTHER> 73
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 146570
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 568
<TOTAL-LIABILITIES> 568
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 132657
<SHARES-COMMON-STOCK> 16333<F1>
<SHARES-COMMON-PRIOR> 16680<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2468
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 10877
<NET-ASSETS> 144161<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 7985<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (1132)<F1>
<NET-INVESTMENT-INCOME> 6853<F1>
<REALIZED-GAINS-CURRENT> 2466
<APPREC-INCREASE-CURRENT> 2642
<NET-CHANGE-FROM-OPS> 12028
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (6853)<F1>
<DISTRIBUTIONS-OF-GAINS> (1235)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 892<F1>
<NUMBER-OF-SHARES-REDEEMED> (1830)<F1>
<SHARES-REINVESTED> 591<F1>
<NET-CHANGE-IN-ASSETS> 787
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1253
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 718<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1132<F1>
<AVERAGE-NET-ASSETS> 143575<F1>
<PER-SHARE-NAV-BEGIN> 8.60<F1>
<PER-SHARE-NII> .41<F1>
<PER-SHARE-GAIN-APPREC> .30<F1>
<PER-SHARE-DIVIDEND> (.41)<F1>
<PER-SHARE-DISTRIBUTIONS> (.07)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.83<F1>
<EXPENSE-RATIO> .79<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class A only. All other data are fund level.
</FN>
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>034
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MICHIGAN CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 133068
<INVESTMENTS-AT-VALUE> 143945
<RECEIVABLES> 2550
<ASSETS-OTHER> 73
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 146570
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 568
<TOTAL-LIABILITIES> 568
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 132657
<SHARES-COMMON-STOCK> 209F1>
<SHARES-COMMON-PRIOR> 215<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2468
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 10877
<NET-ASSETS> 1841<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 96<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (29)<F1>
<NET-INVESTMENT-INCOME> 67<F1>
<REALIZED-GAINS-CURRENT> 2466
<APPREC-INCREASE-CURRENT> 2642
<NET-CHANGE-FROM-OPS> 12028
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (67)<F1>
<DISTRIBUTIONS-OF-GAINS> (16)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 50<F1>
<NUMBER-OF-SHARES-REDEEMED> (63)<F1>
<SHARES-REINVESTED> 7<F1>
<NET-CHANGE-IN-ASSETS> 787
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1253
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 9<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 29<F1>
<AVERAGE-NET-ASSETS> 1730<F1>
<PER-SHARE-NAV-BEGIN> 8.59<F1>
<PER-SHARE-NII> .33<F1>
<PER-SHARE-GAIN-APPREC> .30<F1>
<PER-SHARE-DIVIDEND> (.33)<F1>
<PER-SHARE-DISTRIBUTIONS> (.07)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.82<F1>
<EXPENSE-RATIO> 1.70<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>041
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MINNESOTA SERIES CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 113947
<INVESTMENTS-AT-VALUE> 121733
<RECEIVABLES> 2013
<ASSETS-OTHER> 129
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 123877
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 400
<TOTAL-LIABILITIES> 400
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 114187
<SHARES-COMMON-STOCK> 15217<F1>
<SHARES-COMMON-PRIOR> 15619<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1504
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7786
<NET-ASSETS> 121374<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 6872<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (980)<F1>
<NET-INVESTMENT-INCOME> 5892<F1>
<REALIZED-GAINS-CURRENT> 2327
<APPREC-INCREASE-CURRENT> 715
<NET-CHANGE-FROM-OPS> 9008
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (5892)<F1>
<DISTRIBUTIONS-OF-GAINS> (140)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 528<F1>
<NUMBER-OF-SHARES-REDEEMED> (1447)<F1>
<SHARES-REINVESTED> 517<F1>
<NET-CHANGE-IN-ASSETS> 3
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (681)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 605<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 980<F1>
<AVERAGE-NET-ASSETS> 120928<F1>
<PER-SHARE-NAV-BEGIN> 7.79<F1>
<PER-SHARE-NII> .38<F1>
<PER-SHARE-GAIN-APPREC> .20<F1>
<PER-SHARE-DIVIDEND> (.38)<F1>
<PER-SHARE-DISTRIBUTIONS> (.01)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.98<F1>
<EXPENSE-RATIO> .81<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class A only. All other data are fund level.
</FN>
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>044
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MINNESOTA SERIES CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 113947
<INVESTMENTS-AT-VALUE> 121733
<RECEIVABLES> 2013
<ASSETS-OTHER> 129
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 123877
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 400
<TOTAL-LIABILITIES> 400
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 114187
<SHARES-COMMON-STOCK> 263<F1>
<SHARES-COMMON-PRIOR> 231<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1504
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7786
<NET-ASSETS> 2103<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 107<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (33)<F1>
<NET-INVESTMENT-INCOME> 74<F1>
<REALIZED-GAINS-CURRENT> 2327
<APPREC-INCREASE-CURRENT> 715
<NET-CHANGE-FROM-OPS> 9008
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (74)<F1>
<DISTRIBUTIONS-OF-GAINS> (2)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 91<F1>
<NUMBER-OF-SHARES-REDEEMED> (65)<F1>
<SHARES-REINVESTED> 6<F1>
<NET-CHANGE-IN-ASSETS> 3
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (681)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 9<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 33<F1>
<AVERAGE-NET-ASSETS> 1889<F1>
<PER-SHARE-NAV-BEGIN> 7.79<F1>
<PER-SHARE-NII> .31<F1>
<PER-SHARE-GAIN-APPREC> .20<F1>
<PER-SHARE-DIVIDEND> (.31)<F1>
<PER-SHARE-DISTRIBUTIONS> (.01)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.98<F1>
<EXPENSE-RATIO> 1.72<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>101
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MISSOURI CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 46087
<INVESTMENTS-AT-VALUE> 49592
<RECEIVABLES> 969
<ASSETS-OTHER> 10
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 50572
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 205
<TOTAL-LIABILITIES> 205
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 46126
<SHARES-COMMON-STOCK> 6223<F1>
<SHARES-COMMON-PRIOR> 6749<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 736
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3505
<NET-ASSETS> 49949<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2839<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (462)<F1>
<NET-INVESTMENT-INCOME> 2377<F1>
<REALIZED-GAINS-CURRENT> 792
<APPREC-INCREASE-CURRENT> 985
<NET-CHANGE-FROM-OPS> 4169
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2377)<F1>
<DISTRIBUTIONS-OF-GAINS> (437)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 221<F1>
<NUMBER-OF-SHARES-REDEEMED> (928)<F1>
<SHARES-REINVESTED> 181<F1>
<NET-CHANGE-IN-ASSETS> (2873)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 385
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 259<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 462<F1>
<AVERAGE-NET-ASSETS> 51754<F1>
<PER-SHARE-NAV-BEGIN> 7.82<F1>
<PER-SHARE-NII> .36<F1>
<PER-SHARE-GAIN-APPREC> .28<F1>
<PER-SHARE-DIVIDEND> (.36)<F1>
<PER-SHARE-DISTRIBUTIONS> (.07)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.03<F1>
<EXPENSE-RATIO> .89<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>104
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MISSOURI CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 46087
<INVESTMENTS-AT-VALUE> 49592
<RECEIVABLES> 969
<ASSETS-OTHER> 10
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 50572
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 205
<TOTAL-LIABILITIES> 205
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 46126
<SHARES-COMMON-STOCK> 52<F1>
<SHARES-COMMON-PRIOR> 61<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 736
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3505
<NET-ASSETS> 418<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 22<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (7)<F1>
<NET-INVESTMENT-INCOME> 15<F1>
<REALIZED-GAINS-CURRENT> 792
<APPREC-INCREASE-CURRENT> 985
<NET-CHANGE-FROM-OPS> 4169
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (15)<F1>
<DISTRIBUTIONS-OF-GAINS> (4)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 10<F1>
<NUMBER-OF-SHARES-REDEEMED> (21)<F1>
<SHARES-REINVESTED> 2<F1>
<NET-CHANGE-IN-ASSETS> (2873)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 385
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7<F1>
<AVERAGE-NET-ASSETS> 394<F1>
<PER-SHARE-NAV-BEGIN> 7.82<F1>
<PER-SHARE-NII> .29<F1>
<PER-SHARE-GAIN-APPREC> .28<F1>
<PER-SHARE-DIVIDEND> (.29)<F1>
<PER-SHARE-DISTRIBUTIONS> (.07)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.03<F1>
<EXPENSE-RATIO> 1.79<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>051
<NAME> SELIGMAN MUNICIPAL FUND SERIES-NEW YORK CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 78726
<INVESTMENTS-AT-VALUE> 85746
<RECEIVABLES> 1468
<ASSETS-OTHER> 113
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 87329
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 325
<TOTAL-LIABILITIES> 325
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 77905
<SHARES-COMMON-STOCK> 9867<F1>
<SHARES-COMMON-PRIOR> 10086<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2079
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7020
<NET-ASSETS> 84822<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4642<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (673)<F1>
<NET-INVESTMENT-INCOME> 3969<F1>
<REALIZED-GAINS-CURRENT> 2733
<APPREC-INCREASE-CURRENT> 1350
<NET-CHANGE-FROM-OPS> 8121
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (3969)<F1>
<DISTRIBUTIONS-OF-GAINS> (837)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 798<F1>
<NUMBER-OF-SHARES-REDEEMED> (1379)<F1>
<SHARES-REINVESTED> 362<F1>
<NET-CHANGE-IN-ASSETS> 1904
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 199
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 418<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 673<F1>
<AVERAGE-NET-ASSETS> 83602<F1>
<PER-SHARE-NAV-BEGIN> 8.28<F1>
<PER-SHARE-NII> .40<F1>
<PER-SHARE-GAIN-APPREC> .40<F1>
<PER-SHARE-DIVIDEND> (.40)<F1>
<PER-SHARE-DISTRIBUTIONS> (.08)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.60<F1>
<EXPENSE-RATIO> .81<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>054
<NAME> SELIGMAN MUNICIPAL FUND SERIES-NEW YORK CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 78726
<INVESTMENTS-AT-VALUE> 85746
<RECEIVABLES> 1468
<ASSETS-OTHER> 113
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 87329
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 325
<TOTAL-LIABILITIES> 325
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 77905
<SHARES-COMMON-STOCK> 253<F1>
<SHARES-COMMON-PRIOR> 190<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2079
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7020
<NET-ASSETS> 2182<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 99<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (30)<F1>
<NET-INVESTMENT-INCOME> 69<F1>
<REALIZED-GAINS-CURRENT> 2733
<APPREC-INCREASE-CURRENT> 1350
<NET-CHANGE-FROM-OPS> 8121
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (69)<F1>
<DISTRIBUTIONS-OF-GAINS> (16)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 77<F1>
<NUMBER-OF-SHARES-REDEEMED> (21)<F1>
<SHARES-REINVESTED> 7<F1>
<NET-CHANGE-IN-ASSETS> 1904
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 199
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 9<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 30<F1>
<AVERAGE-NET-ASSETS> 1788<F1>
<PER-SHARE-NAV-BEGIN> 8.29<F1>
<PER-SHARE-NII> .32<F1>
<PER-SHARE-GAIN-APPREC> .39<F1>
<PER-SHARE-DIVIDEND> (.32)<F1>
<PER-SHARE-DISTRIBUTIONS> (.08)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.60<F1>
<EXPENSE-RATIO> 1.72<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>061
<NAME> SELIGMAN MUNICIPAL FUND SERIES-OHIO CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 140748
<INVESTMENTS-AT-VALUE> 151943
<RECEIVABLES> 2693
<ASSETS-OTHER> 161
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 154799
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 570
<TOTAL-LIABILITIES> 570
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 140627
<SHARES-COMMON-STOCK> 18304<F1>
<SHARES-COMMON-PRIOR> 18862<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2407
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 11195
<NET-ASSETS> 153126<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 8694<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (1189)<F1>
<NET-INVESTMENT-INCOME> 7505<F1>
<REALIZED-GAINS-CURRENT> 3398
<APPREC-INCREASE-CURRENT> 1954
<NET-CHANGE-FROM-OPS> 12904
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (7505)<F1>
<DISTRIBUTIONS-OF-GAINS> (2018)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 503<F1>
<NUMBER-OF-SHARES-REDEEMED> (1814)<F1>
<SHARES-REINVESTED> 753<F1>
<NET-CHANGE-IN-ASSETS> (1350)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1042
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 762<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1189<F1>
<AVERAGE-NET-ASSETS> 152535<F1>
<PER-SHARE-NAV-BEGIN> 8.19<F1>
<PER-SHARE-NII> .40<F1>
<PER-SHARE-GAIN-APPREC> .29<F1>
<PER-SHARE-DIVIDEND> (.40)<F1>
<PER-SHARE-DISTRIBUTIONS> (.11)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.37<F1>
<EXPENSE-RATIO> .78<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class A only. All other data are fund level.
</FN>
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>064
<NAME> SELIGMAN MUNICIPAL FUND SERIES-OHIO CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 140748
<INVESTMENTS-AT-VALUE> 151943
<RECEIVABLES> 2693
<ASSETS-OTHER> 161
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 154799
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 570
<TOTAL-LIABILITIES> 570
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 140627
<SHARES-COMMON-STOCK> 131<F1>
<SHARES-COMMON-PRIOR> 141<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2407
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 11195
<NET-ASSETS> 1103<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 67<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (20)<F1>
<NET-INVESTMENT-INCOME> 47<F1>
<REALIZED-GAINS-CURRENT> 3398
<APPREC-INCREASE-CURRENT> 1954
<NET-CHANGE-FROM-OPS> 12904
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (47)<F1>
<DISTRIBUTIONS-OF-GAINS> (15)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 34<F1>
<NUMBER-OF-SHARES-REDEEMED> (50)<F1>
<SHARES-REINVESTED> 6<F1>
<NET-CHANGE-IN-ASSETS> (1350)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1042
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 6<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 20<F1>
<AVERAGE-NET-ASSETS> 1180<F1>
<PER-SHARE-NAV-BEGIN> 8.23<F1>
<PER-SHARE-NII> .33<F1>
<PER-SHARE-GAIN-APPREC> .29<F1>
<PER-SHARE-DIVIDEND> (.33)<F1>
<PER-SHARE-DISTRIBUTIONS> (.11)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.41<F1>
<EXPENSE-RATIO> 1.69<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>111
<NAME> SELIGMAN MUNICIPAL FUND SERIES-OREGON CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 56877
<INVESTMENTS-AT-VALUE> 61232
<RECEIVABLES> 1250
<ASSETS-OTHER> 111
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 62593
<PAYABLE-FOR-SECURITIES> 1967
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 374
<TOTAL-LIABILITIES> 2341
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 55525
<SHARES-COMMON-STOCK> 7159<F1>
<SHARES-COMMON-PRIOR> 7016<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 371
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4355
<NET-ASSETS> 57602<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3045<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (489)<F1>
<NET-INVESTMENT-INCOME> 2556<F1>
<REALIZED-GAINS-CURRENT> 375
<APPREC-INCREASE-CURRENT> 1637
<NET-CHANGE-FROM-OPS> 4641
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2556)<F1>
<DISTRIBUTIONS-OF-GAINS> (700)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 594<F1>
<NUMBER-OF-SHARES-REDEEMED> (722)<F1>
<SHARES-REINVESTED> 271<F1>
<NET-CHANGE-IN-ASSETS> 3334
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 718
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 278<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 489<F1>
<AVERAGE-NET-ASSETS> 55525<F1>
<PER-SHARE-NAV-BEGIN> 7.87<F1>
<PER-SHARE-NII> .36<F1>
<PER-SHARE-GAIN-APPREC> .28<F1>
<PER-SHARE-DIVIDEND> (.36)<F1>
<PER-SHARE-DISTRIBUTIONS> (.10)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.05<F1>
<EXPENSE-RATIO> .88<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>114
<NAME> SELIGMAN MUNICIPAL FUND SERIES-OREGON CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 56877
<INVESTMENTS-AT-VALUE> 61232
<RECEIVABLES> 1249
<ASSETS-OTHER> 111
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 62593
<PAYABLE-FOR-SECURITIES> 1967
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 374
<TOTAL-LIABILITIES> 2341
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 55525
<SHARES-COMMON-STOCK> 329<F1>
<SHARES-COMMON-PRIOR> 213<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 371
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4355
<NET-ASSETS> 2650<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 109<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (36)<F1>
<NET-INVESTMENT-INCOME> 73<F1>
<REALIZED-GAINS-CURRENT> 375
<APPREC-INCREASE-CURRENT> 1637
<NET-CHANGE-FROM-OPS> 4641
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (73)<F1>
<DISTRIBUTIONS-OF-GAINS> (22)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 122<F1>
<NUMBER-OF-SHARES-REDEEMED> (15)<F1>
<SHARES-REINVESTED> 9<F1>
<NET-CHANGE-IN-ASSETS> 3334
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 718
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 10<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 36<F1>
<AVERAGE-NET-ASSETS> 1975<F1>
<PER-SHARE-NAV-BEGIN> 7.87<F1>
<PER-SHARE-NII> .29<F1>
<PER-SHARE-GAIN-APPREC> .27<F1>
<PER-SHARE-DIVIDEND> (.29)<F1>
<PER-SHARE-DISTRIBUTIONS> (.10)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.04<F1>
<EXPENSE-RATIO> 1.79<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>151
<NAME> SELIGMAN MUNICIPAL FUND SERIES-SOUTH CAROLINA CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 101390
<INVESTMENTS-AT-VALUE> 109911
<RECEIVABLES> 2223
<ASSETS-OTHER> 97
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 112233
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 311
<TOTAL-LIABILITIES> 311
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 102677
<SHARES-COMMON-STOCK> 12682<F1>
<SHARES-COMMON-PRIOR> 12375<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 724
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 8521
<NET-ASSETS> 106328<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 5737<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (831)<F1>
<NET-INVESTMENT-INCOME> 4906<F1>
<REALIZED-GAINS-CURRENT> 1214
<APPREC-INCREASE-CURRENT> 2638
<NET-CHANGE-FROM-OPS> 8927
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (4906)<F1>
<DISTRIBUTIONS-OF-GAINS> (905)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1362<F1>
<NUMBER-OF-SHARES-REDEEMED> (1482)<F1>
<SHARES-REINVESTED> 427<F1>
<NET-CHANGE-IN-ASSETS> 7241
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 450
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 518<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 831<F1>
<AVERAGE-NET-ASSETS> 103494<F1>
<PER-SHARE-NAV-BEGIN> 8.16<F1>
<PER-SHARE-NII> .39<F1>
<PER-SHARE-GAIN-APPREC> .29<F1>
<PER-SHARE-DIVIDEND> (.39)<F1>
<PER-SHARE-DISTRIBUTIONS> (.07)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.38<F1>
<EXPENSE-RATIO> .80<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>154
<NAME> SELIGMAN MUNICIPAL FUND SERIES-SOUTH CAROLINA CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-mos
<FISCAL-YEAR-END> SEP-30-1998
<PERIOD-END> SEP-30-1998
<INVESTMENTS-AT-COST> 101390
<INVESTMENTS-AT-VALUE> 109911
<RECEIVABLES> 2223
<ASSETS-OTHER> 97
<OTHER-ITEMS-ASSETS> 2
<TOTAL-ASSETS> 112233
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 311
<TOTAL-LIABILITIES> 311
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 102677
<SHARES-COMMON-STOCK> 668<F1>
<SHARES-COMMON-PRIOR> 449<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 724
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 8521
<NET-ASSETS> 5594<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 244<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (75)<F1>
<NET-INVESTMENT-INCOME> 169<F1>
<REALIZED-GAINS-CURRENT> 1214
<APPREC-INCREASE-CURRENT> 2638
<NET-CHANGE-FROM-OPS> 8927
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (169)<F1>
<DISTRIBUTIONS-OF-GAINS> (35)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 280<F1>
<NUMBER-OF-SHARES-REDEEMED> (81)<F1>
<SHARES-REINVESTED> 20<F1>
<NET-CHANGE-IN-ASSETS> 7241
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 450
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 22<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 75<F1>
<AVERAGE-NET-ASSETS> 4406<F1>
<PER-SHARE-NAV-BEGIN> 8.16<F1>
<PER-SHARE-NII> .31<F1>
<PER-SHARE-GAIN-APPREC> .29<F1>
<PER-SHARE-DIVIDEND> (.31)<F1>
<PER-SHARE-DISTRIBUTIONS> (.07)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.38<F1>
<EXPENSE-RATIO> 1.71<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
INDEPENDENT AUDITORS' REPORT
The Board of Directors
Seligman Municipal Fund Series, Inc
In planning and performing our audit of the financial statements of Seligman
Municipal Fund Series, Inc. (the "Company") (including the National, Colorado,
Georgia, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New
York, Ohio, Oregon and South Carolina Series) for the year ended September 30,
1998 (on which we have issued our report dated October 30, 1998), we considered
its internal control, including control activities for safeguarding securities,
in order to determine our auditing procedures for the purpose of expressing our
opinion on the financial statements and to comply with the requirements of Form
N-SAR, and not to provide assurance on the Company's internal control. The
management of the Company is responsible for establishing and maintaining
internal control. In fulfilling this responsibility, estimates and judgments by
management are required to assess the expected benefits and related costs of
controls. Generally, controls that are relevant to an audit pertain to the
entity's objective of preparing financial statements for external purposes that
are fairly presented in conformity with generally accepted accounting
principles. Those controls include the safeguarding of assets against
unauthorized acquisition, use, or disposition. Because of inherent limitations
in internal control, errors or fraud may occur and not be detected. Also,
projection of any evaluation of internal control to future periods is subject to
the risk that it may be become inadequate because of changes in conditions or
that the effectiveness of the design and operation may deteriorate. Our
consideration of the Company's internal control would not necessarily disclose
all matters in internal control that might be material weaknesses under
standards established by the American Institute of Certified Public Accountants.
A material weakness is a condition in which the design or operation of one or
more of the internal control components does not reduce to a relatively low
level the risk that errors or fraud in amounts that would be material in
relation to the financial statements being audited may occur and not be detected
within a timely period by employees in the normal course of performing their
assigned functions. However, we noted no matters involving the Company's
internal control and its operation, including controls for safeguarding
securities, that we consider to be material weaknesses as defined above as of
September 30, 1998. This report is intended solely for the information and use
of management, the Board of Directors of Seligman Municipal Fund Series, Inc.,
and the Securities Exchange Commission.
October 30, 1998
/S/ DELOITTE & TOUCH, LLP
