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<PAGE> PAGE 10
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<PAGE> PAGE 12
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<PAGE> PAGE 15
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<PAGE> PAGE 19
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<PAGE> PAGE 20
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<PAGE> PAGE 21
070 O020400 N
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<PAGE> PAGE 22
074 D000400 118605
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<PAGE> PAGE 23
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<PAGE> PAGE 24
048 I020500 0.000
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<PAGE> PAGE 25
070 H020500 N
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<PAGE> PAGE 26
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<PAGE> PAGE 27
028 B040600 3855
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<PAGE> PAGE 28
048 B020600 0.000
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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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062 R000900 0.0
063 A000900 0
063 B000900 18.3
064 A000900 Y
064 B000900 Y
065 000900 N
070 A010900 Y
070 A020900 N
070 B010900 N
070 B020900 N
070 C010900 N
070 C020900 N
070 D010900 N
070 D020900 N
070 E010900 N
<PAGE> PAGE 42
070 E020900 N
070 F010900 N
070 F020900 N
070 G010900 N
070 G020900 N
070 H010900 N
070 H020900 N
070 I010900 N
070 I020900 N
070 J010900 Y
070 J020900 Y
070 K010900 N
070 K020900 N
070 L010900 N
070 L020900 N
070 M010900 N
070 M020900 N
070 N010900 N
070 N020900 N
070 O010900 N
070 O020900 N
070 P010900 Y
070 P020900 N
070 Q010900 N
070 Q020900 N
070 R010900 N
070 R020900 N
071 A000900 0
071 B000900 2018
071 C000900 50269
071 D000900 0
072 A000900 6
072 B000900 1532
072 C000900 0
072 D000900 0
072 E000900 0
072 F000900 129
072 G000900 0
072 H000900 0
072 I000900 38
072 J000900 7
072 K000900 2
072 L000900 4
072 M000900 3
072 N000900 1
072 O000900 0
072 P000900 0
072 Q000900 0
072 R000900 15
072 S000900 4
072 T000900 23
<PAGE> PAGE 43
072 U000900 0
072 V000900 3
072 W000900 2
072 X000900 231
072 Y000900 0
072 Z000900 1301
072AA000900 116
072BB000900 0
072CC010900 0
072CC020900 326
072DD010900 1296
072DD020900 5
072EE000900 0
073 A010900 0.1843
073 A020900 0.1508
073 B000900 0.0000
073 C000900 0.0000
074 A000900 113
074 B000900 0
074 C000900 0
074 D000900 48602
074 E000900 0
074 F000900 0
074 G000900 0
074 H000900 0
074 I000900 0
074 J000900 5
074 K000900 7
074 L000900 937
074 M000900 6
074 N000900 49670
074 O000900 0
074 P000900 22
074 Q000900 0
074 R010900 0
074 R020900 0
074 R030900 0
074 R040900 219
074 S000900 0
074 T000900 49429
074 U010900 6795
074 U020900 34
074 V010900 7.24
074 V020900 7.23
074 W000900 0.0000
074 X000900 1485
074 Y000900 0
075 A000900 0
075 B000900 51644
076 000900 0.00
028 A011000 71
<PAGE> PAGE 44
028 A021000 107
028 A031000 0
028 A041000 289
028 B011000 109
028 B021000 470
028 B031000 0
028 B041000 288
028 C011000 3320
028 C021000 107
028 C031000 0
028 C041000 725
028 D011000 1187
028 D021000 115
028 D031000 0
028 D041000 315
028 E011000 51
028 E021000 101
028 E031000 0
028 E041000 379
028 F011000 84
028 F021000 125
028 F031000 0
028 F041000 546
028 G011000 4822
028 G021000 1025
028 G031000 0
028 G041000 2542
028 H001000 605
029 001000 Y
030 A001000 17
030 B001000 4.75
030 C001000 0.00
031 A001000 2
031 B001000 0
032 001000 15
033 001000 0
034 001000 Y
035 001000 0
036 A001000 N
036 B001000 0
042 A001000 0
042 B001000 0
042 C001000 0
042 D001000 100
042 E001000 0
042 F001000 0
042 G001000 0
042 H001000 0
043 001000 29
044 001000 0
045 001000 Y
<PAGE> PAGE 45
046 001000 N
047 001000 Y
048 001000 0.500
048 A011000 0
048 A021000 0.000
048 B011000 0
048 B021000 0.000
048 C011000 0
048 C021000 0.000
048 D011000 0
048 D021000 0.000
048 E011000 0
048 E021000 0.000
048 F011000 0
048 F021000 0.000
048 G011000 0
048 G021000 0.000
048 H011000 0
048 H021000 0.000
048 I011000 0
048 I021000 0.000
048 J011000 0
048 J021000 0.000
048 K011000 0
048 K021000 0.000
049 001000 N
050 001000 N
051 001000 N
052 001000 N
053 A001000 N
055 A001000 N
055 B001000 N
056 001000 Y
057 001000 N
062 A001000 Y
062 B001000 0.0
062 C001000 0.0
062 D001000 0.0
062 E001000 2.6
062 F001000 0.0
062 G001000 0.0
062 H001000 0.0
062 I001000 0.0
062 J001000 0.0
062 K001000 0.0
062 L001000 1.6
062 M001000 0.0
062 N001000 0.0
062 O001000 95.8
062 P001000 0.0
062 Q001000 0.0
<PAGE> PAGE 46
062 R001000 0.0
063 A001000 0
063 B001000 18.5
064 A001000 Y
064 B001000 N
070 A011000 Y
070 A021000 N
070 B011000 N
070 B021000 N
070 C011000 N
070 C021000 N
070 D011000 N
070 D021000 N
070 E011000 N
070 E021000 N
070 F011000 N
070 F021000 N
070 G011000 N
070 G021000 N
070 H011000 N
070 H021000 N
070 I011000 N
070 I021000 N
070 J011000 Y
070 J021000 N
070 K011000 N
070 K021000 N
070 L011000 N
070 L021000 N
070 M011000 N
070 M021000 N
070 N011000 N
070 N021000 N
070 O011000 N
070 O021000 N
070 P011000 Y
070 P021000 N
070 Q011000 N
070 Q021000 N
070 R011000 N
070 R021000 N
071 A001000 4457
071 B001000 2030
071 C001000 50216
071 D001000 4
072 A001000 6
072 B001000 1515
072 C001000 0
072 D001000 0
072 E001000 0
072 F001000 130
<PAGE> PAGE 47
072 G001000 0
072 H001000 0
072 I001000 37
072 J001000 7
072 K001000 2
072 L001000 5
072 M001000 3
072 N001000 1
072 O001000 0
072 P001000 0
072 Q001000 0
072 R001000 15
072 S001000 3
072 T001000 29
072 U001000 0
072 V001000 3
072 W001000 2
072 X001000 237
072 Y001000 0
072 Z001000 1278
072AA001000 375
072BB001000 0
072CC011000 0
072CC021000 1012
072DD011000 1268
072DD021000 10
072EE001000 548
073 A011000 0.1885
073 A021000 0.1545
073 B001000 0.0840
073 C001000 0.0000
074 A001000 56
074 B001000 0
074 C001000 1400
074 D001000 50398
074 E001000 0
074 F001000 0
074 G001000 0
074 H001000 0
074 I001000 0
074 J001000 0
074 K001000 6
074 L001000 1035
074 M001000 7
074 N001000 52902
074 O001000 0
074 P001000 30
074 Q001000 0
074 R011000 0
074 R021000 0
074 R031000 0
<PAGE> PAGE 48
074 R041000 246
074 S001000 0
074 T001000 52626
074 U011000 6923
074 U021000 58
074 V011000 7.54
074 V021000 7.54
074 W001000 0.0000
074 X001000 1475
074 Y001000 0
075 A001000 0
075 B001000 52271
076 001000 0.00
028 A011100 193
028 A021100 153
028 A031100 0
028 A041100 556
028 B011100 141
028 B021100 397
028 B031100 0
028 B041100 1070
028 C011100 320
028 C021100 151
028 C031100 0
028 C041100 1025
028 D011100 157
028 D021100 164
028 D031100 0
028 D041100 904
028 E011100 301
028 E021100 139
028 E031100 0
028 E041100 766
028 F011100 119
028 F021100 133
028 F031100 0
028 F041100 740
028 G011100 1231
028 G021100 1137
028 G031100 0
028 G041100 5061
028 H001100 1214
029 001100 Y
030 A001100 42
030 B001100 4.75
030 C001100 0.00
031 A001100 5
031 B001100 0
032 001100 37
033 001100 0
034 001100 Y
<PAGE> PAGE 49
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
043 001100 34
044 001100 0
045 001100 Y
046 001100 N
047 001100 Y
048 001100 0.500
048 A011100 0
048 A021100 0.000
048 B011100 0
048 B021100 0.000
048 C011100 0
048 C021100 0.000
048 D011100 0
048 D021100 0.000
048 E011100 0
048 E021100 0.000
048 F011100 0
048 F021100 0.000
048 G011100 0
048 G021100 0.000
048 H011100 0
048 H021100 0.000
048 I011100 0
048 I021100 0.000
048 J011100 0
048 J021100 0.000
048 K011100 0
048 K021100 0.000
049 001100 N
050 001100 N
051 001100 N
052 001100 N
053 A001100 N
055 A001100 N
055 B001100 N
056 001100 Y
057 001100 N
062 A001100 Y
062 B001100 0.0
062 C001100 0.0
<PAGE> PAGE 50
062 D001100 0.0
062 E001100 1.6
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 96.8
062 P001100 0.0
062 Q001100 0.0
062 R001100 0.0
063 A001100 0
063 B001100 19.4
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
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 N
<PAGE> PAGE 51
070 Q011100 N
070 Q021100 N
070 R011100 N
070 R021100 N
071 A001100 4389
071 B001100 8856
071 C001100 56108
071 D001100 8
072 A001100 6
072 B001100 1675
072 C001100 0
072 D001100 0
072 E001100 0
072 F001100 144
072 G001100 0
072 H001100 0
072 I001100 42
072 J001100 10
072 K001100 2
072 L001100 4
072 M001100 3
072 N001100 1
072 O001100 0
072 P001100 0
072 Q001100 0
072 R001100 15
072 S001100 4
072 T001100 34
072 U001100 0
072 V001100 3
072 W001100 2
072 X001100 264
072 Y001100 0
072 Z001100 1411
072AA001100 226
072BB001100 9
072CC011100 0
072CC021100 481
072DD011100 1381
072DD021100 30
072EE001100 313
073 A011100 0.1881
073 A021100 0.1535
073 B001100 0.0410
073 C001100 0.0000
074 A001100 4
074 B001100 0
074 C001100 900
074 D001100 53823
074 E001100 0
074 F001100 0
<PAGE> PAGE 52
074 G001100 0
074 H001100 0
074 I001100 0
074 J001100 0
074 K001100 8
074 L001100 1084
074 M001100 8
074 N001100 55827
074 O001100 0
074 P001100 26
074 Q001100 0
074 R011100 0
074 R021100 0
074 R031100 0
074 R041100 184
074 S001100 0
074 T001100 55617
074 U011100 7167
074 U021100 182
074 V011100 7.57
074 V021100 7.56
074 W001100 0.0000
074 X001100 1664
074 Y001100 0
075 A001100 0
075 B001100 57762
076 001100 0.00
028 A011300 242
028 A021300 141
028 A031300 0
028 A041300 1069
028 B011300 195
028 B021300 292
028 B031300 0
028 B041300 546
028 C011300 217
028 C021300 140
028 C031300 0
028 C041300 349
028 D011300 522
028 D021300 154
028 D031300 0
028 D041300 770
028 E011300 284
028 E021300 135
028 E031300 0
028 E041300 595
028 F011300 118
028 F021300 131
028 F031300 0
028 F041300 1210
<PAGE> PAGE 53
028 G011300 1578
028 G021300 993
028 G031300 0
028 G041300 4539
028 H001300 890
029 001300 Y
030 A001300 35
030 B001300 4.75
030 C001300 0.00
031 A001300 4
031 B001300 0
032 001300 31
033 001300 0
034 001300 Y
035 001300 4
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 34
044 001300 0
045 001300 Y
046 001300 N
047 001300 Y
048 001300 0.500
048 A011300 0
048 A021300 0.000
048 B011300 0
048 B021300 0.000
048 C011300 0
048 C021300 0.000
048 D011300 0
048 D021300 0.000
048 E011300 0
048 E021300 0.000
048 F011300 0
048 F021300 0.000
048 G011300 0
048 G021300 0.000
048 H011300 0
048 H021300 0.000
048 I011300 0
048 I021300 0.000
048 J011300 0
048 J021300 0.000
<PAGE> PAGE 54
048 K011300 0
048 K021300 0.000
049 001300 N
050 001300 N
051 001300 N
052 001300 N
053 A001300 N
055 A001300 N
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 0.8
062 F001300 0.0
062 G001300 0.0
062 H001300 0.0
062 I001300 0.0
062 J001300 0.0
062 K001300 0.0
062 L001300 1.5
062 M001300 0.0
062 N001300 0.0
062 O001300 97.7
062 P001300 0.0
062 Q001300 0.0
062 R001300 0.0
063 A001300 0
063 B001300 19.9
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
<PAGE> PAGE 55
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 1902
071 B001300 2969
071 C001300 51257
071 D001300 4
072 A001300 6
072 B001300 1508
072 C001300 0
072 D001300 0
072 E001300 0
072 F001300 131
072 G001300 0
072 H001300 0
072 I001300 38
072 J001300 7
072 K001300 2
072 L001300 4
072 M001300 3
072 N001300 1
072 O001300 0
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072 Q001300 0
072 R001300 15
072 S001300 2
072 T001300 34
072 U001300 0
072 V001300 3
072 W001300 2
072 X001300 242
072 Y001300 0
072 Z001300 1266
072AA001300 0
072BB001300 20
072CC011300 0
<PAGE> PAGE 56
072CC021300 432
072DD011300 1224
072DD021300 42
072EE001300 187
073 A011300 0.1912
073 A021300 0.1559
073 B001300 0.0280
073 C001300 0.0000
074 A001300 246
074 B001300 0
074 C001300 400
074 D001300 49549
074 E001300 0
074 F001300 0
074 G001300 0
074 H001300 0
074 I001300 0
074 J001300 0
074 K001300 8
074 L001300 883
074 M001300 6
074 N001300 51092
074 O001300 0
074 P001300 23
074 Q001300 0
074 R011300 0
074 R021300 0
074 R031300 0
074 R041300 354
074 S001300 0
074 T001300 50715
074 U011300 6232
074 U021300 295
074 V011300 7.77
074 V021300 7.79
074 W001300 0.0000
074 X001300 1231
074 Y001300 0
075 A001300 0
075 B001300 52674
076 001300 0.00
028 A011500 392
028 A021500 271
028 A031500 0
028 A041500 757
028 B011500 307
028 B021500 1618
028 B031500 0
028 B041500 1721
028 C011500 686
028 C021500 269
<PAGE> PAGE 57
028 C031500 0
028 C041500 1346
028 D011500 482
028 D021500 298
028 D031500 0
028 D041500 1290
028 E011500 634
028 E021500 260
028 E031500 0
028 E041500 2276
028 F011500 561
028 F021500 250
028 F031500 0
028 F041500 2206
028 G011500 3062
028 G021500 2966
028 G031500 0
028 G041500 9596
028 H001500 2642
029 001500 Y
030 A001500 71
030 B001500 4.75
030 C001500 0.00
031 A001500 8
031 B001500 0
032 001500 61
033 001500 2
034 001500 Y
035 001500 1
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 65
044 001500 0
045 001500 Y
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048 001500 0.500
048 A011500 0
048 A021500 0.000
048 B011500 0
048 B021500 0.000
048 C011500 0
048 C021500 0.000
<PAGE> PAGE 58
048 D011500 0
048 D021500 0.000
048 E011500 0
048 E021500 0.000
048 F011500 0
048 F021500 0.000
048 G011500 0
048 G021500 0.000
048 H011500 0
048 H021500 0.000
048 I011500 0
048 I021500 0.000
048 J011500 0
048 J021500 0.000
048 K011500 0
048 K021500 0.000
049 001500 N
050 001500 N
051 001500 N
052 001500 N
053 A001500 N
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 0.0
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 1.1
062 M001500 0.0
062 N001500 0.0
062 O001500 98.9
062 P001500 0.0
062 Q001500 0.0
062 R001500 0.0
063 A001500 0
063 B001500 19.6
064 A001500 Y
064 B001500 N
070 A011500 Y
070 A021500 N
070 B011500 N
070 B021500 N
<PAGE> PAGE 59
070 C011500 N
070 C021500 N
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 Y
070 Q011500 N
070 Q021500 N
070 R011500 N
070 R021500 N
071 A001500 0
071 B001500 4317
071 C001500 107500
071 D001500 0
072 A001500 6
072 B001500 3221
072 C001500 0
072 D001500 0
072 E001500 0
072 F001500 272
072 G001500 0
072 H001500 0
072 I001500 76
072 J001500 15
072 K001500 2
072 L001500 3
072 M001500 3
072 N001500 1
072 O001500 0
<PAGE> PAGE 60
072 P001500 0
072 Q001500 0
072 R001500 15
072 S001500 2
072 T001500 65
072 U001500 0
072 V001500 5
072 W001500 4
072 X001500 463
072 Y001500 0
072 Z001500 2758
072AA001500 194
072BB001500 0
072CC011500 0
072CC021500 1266
072DD011500 2698
072DD021500 60
072EE001500 1710
073 A011500 0.2032
073 A021500 0.1666
073 B001500 0.1250
073 C001500 0.0000
074 A001500 0
074 B001500 0
074 C001500 0
074 D001500 103385
074 E001500 0
074 F001500 0
074 G001500 0
074 H001500 0
074 I001500 0
074 J001500 0
074 K001500 15
074 L001500 1876
074 M001500 9
074 N001500 105285
074 O001500 0
074 P001500 49
074 Q001500 0
074 R011500 0
074 R021500 0
074 R031500 0
074 R041500 709
074 S001500 0
074 T001500 104527
074 U011500 12883
074 U021500 409
074 V011500 7.86
074 V021500 7.86
074 W001500 0.0000
074 X001500 2301
<PAGE> PAGE 61
074 Y001500 0
075 A001500 0
075 B001500 109258
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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 101555
<INVESTMENTS-AT-VALUE> 102214
<RECEIVABLES> 2263
<ASSETS-OTHER> 268
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 104745
<PAYABLE-FOR-SECURITIES> 7283
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 479
<TOTAL-LIABILITIES> 7762
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 99599
<SHARES-COMMON-STOCK> 12444<F1>
<SHARES-COMMON-PRIOR> 12821<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (3275)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 659
<NET-ASSETS> 94980<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2897<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (407)<F1>
<NET-INVESTMENT-INCOME> 2490<F1>
<REALIZED-GAINS-CURRENT> (62)
<APPREC-INCREASE-CURRENT> (782)
<NET-CHANGE-FROM-OPS> 1733
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2490)<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 509<F1>
<NUMBER-OF-SHARES-REDEEMED> (1059)<F1>
<SHARES-REINVESTED> 173<F1>
<NET-CHANGE-IN-ASSETS> (6610)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (3213)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 244<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 407<F1>
<AVERAGE-NET-ASSETS> 97832<F1>
<PER-SHARE-NAV-BEGIN> 7.70<F1>
<PER-SHARE-NII> .20<F1>
<PER-SHARE-GAIN-APPREC> (.07)<F1>
<PER-SHARE-DIVIDEND> (.20)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.63<F1>
<EXPENSE-RATIO> .83<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 101555
<INVESTMENTS-AT-VALUE> 102214
<RECEIVABLES> 2263
<ASSETS-OTHER> 268
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 104745
<PAYABLE-FOR-SECURITIES> 7283
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 479
<TOTAL-LIABILITIES> 7762
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 99599
<SHARES-COMMON-STOCK> 263<F1>
<SHARES-COMMON-PRIOR> 627<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (3275)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 659
<NET-ASSETS> 2003<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 123<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (36)<F1>
<NET-INVESTMENT-INCOME> 87<F1>
<REALIZED-GAINS-CURRENT> (62)
<APPREC-INCREASE-CURRENT> (782)
<NET-CHANGE-FROM-OPS> 1733
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (87)<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2141<F1>
<NUMBER-OF-SHARES-REDEEMED> (2513)<F1>
<SHARES-REINVESTED> 8<F1>
<NET-CHANGE-IN-ASSETS> (6610)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (3213)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 10<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 36<F1>
<AVERAGE-NET-ASSETS> 4230<F1>
<PER-SHARE-NAV-BEGIN> 7.70<F1>
<PER-SHARE-NII> .16<F1>
<PER-SHARE-GAIN-APPREC> (.07)<F1>
<PER-SHARE-DIVIDEND> (.16)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.63<F1>
<EXPENSE-RATIO> 1.74<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 101887
<INVESTMENTS-AT-VALUE> 103324
<RECEIVABLES> 1831
<ASSETS-OTHER> 273
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 105428
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 514
<TOTAL-LIABILITIES> 514
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 103157
<SHARES-COMMON-STOCK> 13427<F1>
<SHARES-COMMON-PRIOR> 14004<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 320
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1437
<NET-ASSETS> 103410<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3232<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (448)<F1>
<NET-INVESTMENT-INCOME> 2784<F1>
<REALIZED-GAINS-CURRENT> 325
<APPREC-INCREASE-CURRENT> (1258)
<NET-CHANGE-FROM-OPS> 1881
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2784)<F1>
<DISTRIBUTIONS-OF-GAINS> (1069)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 885<F1>
<NUMBER-OF-SHARES-REDEEMED> (1770)<F1>
<SHARES-REINVESTED> 308<F1>
<NET-CHANGE-IN-ASSETS> (6363)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1078
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 271<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 448<F1>
<AVERAGE-NET-ASSETS> 108420<F1>
<PER-SHARE-NAV-BEGIN> 7.85<F1>
<PER-SHARE-NII> .20<F1>
<PER-SHARE-GAIN-APPREC> (.07)<F1>
<PER-SHARE-DIVIDEND> (.20)<F1>
<PER-SHARE-DISTRIBUTIONS> (.08)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.70<F1>
<EXPENSE-RATIO> .83<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 101887
<INVESTMENTS-AT-VALUE> 103324
<RECEIVABLES> 1831
<ASSETS-OTHER> 273
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 105428
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 514
<TOTAL-LIABILITIES> 514
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 103157
<SHARES-COMMON-STOCK> 195<F1>
<SHARES-COMMON-PRIOR> 179<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 320
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1437
<NET-ASSETS> 1504<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 43<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (13)<F1>
<NET-INVESTMENT-INCOME> 30<F1>
<REALIZED-GAINS-CURRENT> 325
<APPREC-INCREASE-CURRENT> (1258)
<NET-CHANGE-FROM-OPS> 1881
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (30)<F1>
<DISTRIBUTIONS-OF-GAINS> (14)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 20<F1>
<NUMBER-OF-SHARES-REDEEMED> (8)<F1>
<SHARES-REINVESTED> 4<F1>
<NET-CHANGE-IN-ASSETS> (6363)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1078
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 13<F1>
<AVERAGE-NET-ASSETS> 1445<F1>
<PER-SHARE-NAV-BEGIN> 7.84<F1>
<PER-SHARE-NII> .17<F1>
<PER-SHARE-GAIN-APPREC> (.06)<F1>
<PER-SHARE-DIVIDEND> (.17)<F1>
<PER-SHARE-DISTRIBUTIONS> (.08)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.70<F1>
<EXPENSE-RATIO> 1.74<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 136982
<INVESTMENTS-AT-VALUE> 140338
<RECEIVABLES> 2838
<ASSETS-OTHER> 301
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 143477
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 599
<TOTAL-LIABILITIES> 599
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 138588
<SHARES-COMMON-STOCK> 17057<F1>
<SHARES-COMMON-PRIOR> 17517<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 933
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3356
<NET-ASSETS> 141426<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4394<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (593)<F1>
<NET-INVESTMENT-INCOME> 3801<F1>
<REALIZED-GAINS-CURRENT> 940
<APPREC-INCREASE-CURRENT> (2226)
<NET-CHANGE-FROM-OPS> (2547)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (3801)<F1>
<DISTRIBUTIONS-OF-GAINS> (1581)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 808<F1>
<NUMBER-OF-SHARES-REDEEMED> (1682)<F1>
<SHARES-REINVESTED> 414<F1>
<NET-CHANGE-IN-ASSETS> (6786)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1593
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 364<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 593<F1>
<AVERAGE-NET-ASSETS> 145917<F1>
<PER-SHARE-NAV-BEGIN> 8.46
<PER-SHARE-NII> .22<F1>
<PER-SHARE-GAIN-APPREC> (.08)<F1>
<PER-SHARE-DIVIDEND> (.22)<F1>
<PER-SHARE-DISTRIBUTIONS> (.09)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.29<F1>
<EXPENSE-RATIO> .82<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>034
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MICHIGAN CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 136982
<INVESTMENTS-AT-VALUE> 140338
<RECEIVABLES> 2838
<ASSETS-OTHER> 301
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 143477
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 599
<TOTAL-LIABILITIES> 599
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 138588
<SHARES-COMMON-STOCK> 175<F1>
<SHARES-COMMON-PRIOR> 176<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 933
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3356
<NET-ASSETS> 1452<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 46<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (13)<F1>
<NET-INVESTMENT-INCOME> 33<F1>
<REALIZED-GAINS-CURRENT> 940
<APPREC-INCREASE-CURRENT> (2226)
<NET-CHANGE-FROM-OPS> (2547)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (33)<F1>
<DISTRIBUTIONS-OF-GAINS> (18)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 53<F1>
<NUMBER-OF-SHARES-REDEEMED> (58)<F1>
<SHARES-REINVESTED> 4<F1>
<NET-CHANGE-IN-ASSETS> (6786)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1593
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 13<F1>
<AVERAGE-NET-ASSETS> 1531<F1>
<PER-SHARE-NAV-BEGIN> 8.45
<PER-SHARE-NII> .18<F1>
<PER-SHARE-GAIN-APPREC> (.07)<F1>
<PER-SHARE-DIVIDEND> (.18)<F1>
<PER-SHARE-DISTRIBUTIONS> (.09)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.29<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>041
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MINNESOTA SERIES CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 119106
<INVESTMENTS-AT-VALUE> 123505
<RECEIVABLES> 1865
<ASSETS-OTHER> 76
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 125446
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 485
<TOTAL-LIABILITIES> 485
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 121315
<SHARES-COMMON-STOCK> 16164<F1>
<SHARES-COMMON-PRIOR> 16423<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (753)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4399
<NET-ASSETS> 123174<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3795<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (531)<F1>
<NET-INVESTMENT-INCOME> 3264<F1>
<REALIZED-GAINS-CURRENT> 687
<APPREC-INCREASE-CURRENT> (1693)
<NET-CHANGE-FROM-OPS> 2302
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (3264)<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 593<F1>
<NUMBER-OF-SHARES-REDEEMED> (1139)<F1>
<SHARES-REINVESTED> 287<F1>
<NET-CHANGE-IN-ASSETS> (3248)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (1439)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 312<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 531<F1>
<AVERAGE-NET-ASSETS> 125384<F1>
<PER-SHARE-NAV-BEGIN> 7.68
<PER-SHARE-NII> .20<F1>
<PER-SHARE-GAIN-APPREC> (.06)<F1>
<PER-SHARE-DIVIDEND> (.20)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.62<F1>
<EXPENSE-RATIO> .85<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>044
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MINNESOTA SERIES CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 119106
<INVESTMENTS-AT-VALUE> 123505
<RECEIVABLES> 1865
<ASSETS-OTHER> 76
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 125446
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 485
<TOTAL-LIABILITIES> 485
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 121315
<SHARES-COMMON-STOCK> 234<F1>
<SHARES-COMMON-PRIOR> 265<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (753)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4399
<NET-ASSETS> 1787<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 62<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (18)<F1>
<NET-INVESTMENT-INCOME> 44<F1>
<REALIZED-GAINS-CURRENT> 687
<APPREC-INCREASE-CURRENT> (1693)
<NET-CHANGE-FROM-OPS> 2302
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (44)<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 15<F1>
<NUMBER-OF-SHARES-REDEEMED> (50)<F1>
<SHARES-REINVESTED> 4<F1>
<NET-CHANGE-IN-ASSETS> (3248)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (1439)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 5<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 18<F1>
<AVERAGE-NET-ASSETS> 2021<F1>
<PER-SHARE-NAV-BEGIN> 7.68
<PER-SHARE-NII> .17<F1>
<PER-SHARE-GAIN-APPREC> (.06)<F1>
<PER-SHARE-DIVIDEND> (.17)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.62<F1>
<EXPENSE-RATIO> 1.75<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 77667
<INVESTMENTS-AT-VALUE> 79405
<RECEIVABLES> 1874
<ASSETS-OTHER> 226
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 81065
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 278
<TOTAL-LIABILITIES> 278
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 79031
<SHARES-COMMON-STOCK> 10091<F1>
<SHARES-COMMON-PRIOR> 10372<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 18
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1738
<NET-ASSETS> 79546<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2421<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (334)<F1>
<NET-INVESTMENT-INCOME> 2087<F1>
<REALIZED-GAINS-CURRENT> 20
<APPREC-INCREASE-CURRENT> (761)
<NET-CHANGE-FROM-OPS> 1371
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2087)<F1>
<DISTRIBUTIONS-OF-GAINS> (214)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 606<F1>
<NUMBER-OF-SHARES-REDEEMED> (1056)<F1>
<SHARES-REINVESTED> 169<F1>
<NET-CHANGE-IN-ASSETS> (3085)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 215
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 204<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 334<F1>
<AVERAGE-NET-ASSETS> 81863<F1>
<PER-SHARE-NAV-BEGIN> 7.98
<PER-SHARE-NII> .20<F1>
<PER-SHARE-GAIN-APPREC> (.08)<F1>
<PER-SHARE-DIVIDEND> (.20)<F1>
<PER-SHARE-DISTRIBUTIONS> (.02)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.88<F1>
<EXPENSE-RATIO> .82<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 77667
<INVESTMENTS-AT-VALUE> 79405
<RECEIVABLES> 1874
<ASSETS-OTHER> 226
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 81065
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 278
<TOTAL-LIABILITIES> 278
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 79031
<SHARES-COMMON-STOCK> 157<F1>
<SHARES-COMMON-PRIOR> 144<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 18
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1738
<NET-ASSETS> 1241<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 37<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (11)<F1>
<NET-INVESTMENT-INCOME> 26<F1>
<REALIZED-GAINS-CURRENT> 20
<APPREC-INCREASE-CURRENT> (761)
<NET-CHANGE-FROM-OPS> 1371
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (26)<F1>
<DISTRIBUTIONS-OF-GAINS> (3)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 19<F1>
<NUMBER-OF-SHARES-REDEEMED> (8)<F1>
<SHARES-REINVESTED> 2<F1>
<NET-CHANGE-IN-ASSETS> (3085)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 215
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 11<F1>
<AVERAGE-NET-ASSETS> 1231<F1>
<PER-SHARE-NAV-BEGIN> 7.98
<PER-SHARE-NII> .17<F1>
<PER-SHARE-GAIN-APPREC> (.07)<F1>
<PER-SHARE-DIVIDEND> (.17)<F1>
<PER-SHARE-DISTRIBUTIONS> (.02)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.89<F1>
<EXPENSE-RATIO> 1.73<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 147276
<INVESTMENTS-AT-VALUE> 152074
<RECEIVABLES> 2739
<ASSETS-OTHER> 213
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 155026
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 545
<TOTAL-LIABILITIES> 545
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 148992
<SHARES-COMMON-STOCK> 19342<F1>
<SHARES-COMMON-PRIOR> 20051<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 691
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4798
<NET-ASSETS> 153521<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4767<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (637)<F1>
<NET-INVESTMENT-INCOME> 4130<F1>
<REALIZED-GAINS-CURRENT> 701
<APPREC-INCREASE-CURRENT> (2322)
<NET-CHANGE-FROM-OPS> 2530
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (4130)<F1>
<DISTRIBUTIONS-OF-GAINS> (1382)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 256<F1>
<NUMBER-OF-SHARES-REDEEMED> (1416)<F1>
<SHARES-REINVESTED> 451<F1>
<NET-CHANGE-IN-ASSETS> (8773)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1381
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 395<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 637<F1>
<AVERAGE-NET-ASSETS> 158847<F1>
<PER-SHARE-NAV-BEGIN> 8.09<F1>
<PER-SHARE-NII> .21<F1>
<PER-SHARE-GAIN-APPREC> (.08)<F1>
<PER-SHARE-DIVIDEND> (.21)<F1>
<PER-SHARE-DISTRIBUTIONS> (.07)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.94<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>064
<NAME> SELIGMAN MUNICIPAL FUND SERIES-OHIO CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 147276
<INVESTMENTS-AT-VALUE> 152074
<RECEIVABLES> 2739
<ASSETS-OTHER> 213
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 155026
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 545
<TOTAL-LIABILITIES> 545
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 148992
<SHARES-COMMON-STOCK> 120<F1>
<SHARES-COMMON-PRIOR> 124<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 691
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4798
<NET-ASSETS> 960<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 29<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (8)<F1>
<NET-INVESTMENT-INCOME> 21<F1>
<REALIZED-GAINS-CURRENT> 701
<APPREC-INCREASE-CURRENT> (2322)
<NET-CHANGE-FROM-OPS> 2530
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (21)<F1>
<DISTRIBUTIONS-OF-GAINS> (8)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 14<F1>
<NUMBER-OF-SHARES-REDEEMED> (21)<F1>
<SHARES-REINVESTED> 3<F1>
<NET-CHANGE-IN-ASSETS> (8773)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1381
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 8<F1>
<AVERAGE-NET-ASSETS> 965<F1>
<PER-SHARE-NAV-BEGIN> 8.13<F1>
<PER-SHARE-NII> .17<F1>
<PER-SHARE-GAIN-APPREC> (.08)<F1>
<PER-SHARE-DIVIDEND> (.17)<F1>
<PER-SHARE-DISTRIBUTIONS> (.07)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.98<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>071
<NAME> SELIGMAN MUNICIPAL FUND SERIES-LOUISIANA CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 53050
<INVESTMENTS-AT-VALUE> 54708
<RECEIVABLES> 980
<ASSETS-OTHER> 207
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 55895
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 250
<TOTAL-LIABILITIES> 250
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 53950
<SHARES-COMMON-STOCK> 6887<F1>
<SHARES-COMMON-PRIOR> 7014<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 36
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1658
<NET-ASSETS> 55239<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1686<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (243)<F1>
<NET-INVESTMENT-INCOME> 1443<F1>
<REALIZED-GAINS-CURRENT> 39
<APPREC-INCREASE-CURRENT> (282)
<NET-CHANGE-FROM-OPS> 1208
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1443)<F1>
<DISTRIBUTIONS-OF-GAINS> (753)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 74<F1>
<NUMBER-OF-SHARES-REDEEMED> (356)<F1>
<SHARES-REINVESTED> 155<F1>
<NET-CHANGE-IN-ASSETS> (2009)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 755
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 141<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 243<F1>
<AVERAGE-NET-ASSETS> 56698<F1>
<PER-SHARE-NAV-BEGIN> 8.16<F1>
<PER-SHARE-NII> .21<F1>
<PER-SHARE-GAIN-APPREC> (.03)<F1>
<PER-SHARE-DIVIDEND> (.21)<F1>
<PER-SHARE-DISTRIBUTIONS> (.11)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.02<F1>
<EXPENSE-RATIO> .86<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 53050
<INVESTMENTS-AT-VALUE> 54708
<RECEIVABLES> 980
<ASSETS-OTHER> 207
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 55895
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 250
<TOTAL-LIABILITIES> 250
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 53950
<SHARES-COMMON-STOCK> 51<F1>
<SHARES-COMMON-PRIOR> 48<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 36
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1658
<NET-ASSETS> 406<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 12<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (4)<F1>
<NET-INVESTMENT-INCOME> 8<F1>
<REALIZED-GAINS-CURRENT> 39
<APPREC-INCREASE-CURRENT> (282)
<NET-CHANGE-FROM-OPS> 1208
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (8)<F1>
<DISTRIBUTIONS-OF-GAINS> (5)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4<F1>
<NUMBER-OF-SHARES-REDEEMED> (2)<F1>
<SHARES-REINVESTED> 1<F1>
<NET-CHANGE-IN-ASSETS> (2009)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 755
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4<F1>
<AVERAGE-NET-ASSETS> 392<F1>
<PER-SHARE-NAV-BEGIN> 8.16<F1>
<PER-SHARE-NII> .17<F1>
<PER-SHARE-GAIN-APPREC> (.03)<F1>
<PER-SHARE-DIVIDEND> (.17)<F1>
<PER-SHARE-DISTRIBUTIONS> (.11)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.02<F1>
<EXPENSE-RATIO> 1.76<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 52175
<INVESTMENTS-AT-VALUE> 53395
<RECEIVABLES> 1081
<ASSETS-OTHER> 76
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 54552
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 202
<TOTAL-LIABILITIES> 202
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 52873
<SHARES-COMMON-STOCK> 6671<F1>
<SHARES-COMMON-PRIOR> 6765<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 256
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1220
<NET-ASSETS> 52440<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1573<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (239)<F1>
<NET-INVESTMENT-INCOME> 1334<F1>
<REALIZED-GAINS-CURRENT> 320
<APPREC-INCREASE-CURRENT> (908)
<NET-CHANGE-FROM-OPS> 788
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1334)<F1>
<DISTRIBUTIONS-OF-GAINS> (281)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 134<F1>
<NUMBER-OF-SHARES-REDEEMED> (350)<F1>
<SHARES-REINVESTED> 122<F1>
<NET-CHANGE-IN-ASSETS> (1738)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 228
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 134<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 239<F1>
<AVERAGE-NET-ASSETS> 53648<F1>
<PER-SHARE-NAV-BEGIN> 7.99
<PER-SHARE-NII> .20<F1>
<PER-SHARE-GAIN-APPREC> (.09)<F1>
<PER-SHARE-DIVIDEND> (.20)<F1>
<PER-SHARE-DISTRIBUTIONS> (.04)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.86<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 52175
<INVESTMENTS-AT-VALUE> 53395
<RECEIVABLES> 1081
<ASSETS-OTHER> 76
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 54552
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 202
<TOTAL-LIABILITIES> 202
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 52873
<SHARES-COMMON-STOCK> 243<F1>
<SHARES-COMMON-PRIOR> 256<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 256
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1220
<NET-ASSETS> 1910<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 59<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (18)<F1>
<NET-INVESTMENT-INCOME> 41<F1>
<REALIZED-GAINS-CURRENT> 320
<APPREC-INCREASE-CURRENT> (908)
<NET-CHANGE-FROM-OPS> 788
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (41)<F1>
<DISTRIBUTIONS-OF-GAINS> (11)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 32<F1>
<NUMBER-OF-SHARES-REDEEMED> (51)<F1>
<SHARES-REINVESTED> 6<F1>
<NET-CHANGE-IN-ASSETS> (1738)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 228
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 5<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 18<F1>
<AVERAGE-NET-ASSETS> 2022<F1>
<PER-SHARE-NAV-BEGIN> 7.99
<PER-SHARE-NII> .16<F1>
<PER-SHARE-GAIN-APPREC> (.08)<F1>
<PER-SHARE-DIVIDEND> (.16)<F1>
<PER-SHARE-DISTRIBUTIONS> (.04)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.87<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>091
<NAME> SELIGMAN MUNICIPAL FUND SERIES - COLORADO CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 48154
<INVESTMENTS-AT-VALUE> 48602
<RECEIVABLES> 955
<ASSETS-OTHER> 113
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 49670
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 241
<TOTAL-LIABILITIES> 241
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 48903
<SHARES-COMMON-STOCK> 6795<F1>
<SHARES-COMMON-PRIOR> 7193<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 78
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 448
<NET-ASSETS> 49180<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1524<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (228)<F1>
<NET-INVESTMENT-INCOME> 1296<F1>
<REALIZED-GAINS-CURRENT> 116
<APPREC-INCREASE-CURRENT> (326)
<NET-CHANGE-FROM-OPS> 1091
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1296)<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 251<F1>
<NUMBER-OF-SHARES-REDEEMED> (745)<F1>
<SHARES-REINVESTED> 96<F1>
<NET-CHANGE-IN-ASSETS> (3121)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (38)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 128<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 228<F1>
<AVERAGE-NET-ASSETS> 51391<F1>
<PER-SHARE-NAV-BEGIN> 7.27<F1>
<PER-SHARE-NII> .18<F1>
<PER-SHARE-GAIN-APPREC> (.03)<F1>
<PER-SHARE-DIVIDEND> (.18)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.24<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>094
<NAME> SELIGMAN MUNICIPAL FUND SERIES - COLORADO CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 48154
<INVESTMENTS-AT-VALUE> 48602
<RECEIVABLES> 955
<ASSETS-OTHER> 113
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 49670
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 241
<TOTAL-LIABILITIES> 241
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 48903
<SHARES-COMMON-STOCK> 34<F1>
<SHARES-COMMON-PRIOR> 35<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 78
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 448
<NET-ASSETS> 249<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 7<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (2)<F1>
<NET-INVESTMENT-INCOME> 5<F1>
<REALIZED-GAINS-CURRENT> 116
<APPREC-INCREASE-CURRENT> (326)
<NET-CHANGE-FROM-OPS> 1091
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (5)<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4<F1>
<NUMBER-OF-SHARES-REDEEMED> (5)<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> (3121)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (38)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2<F1>
<AVERAGE-NET-ASSETS> 254<F1>
<PER-SHARE-NAV-BEGIN> 7.27<F1>
<PER-SHARE-NII> .15<F1>
<PER-SHARE-GAIN-APPREC> (.04)<F1>
<PER-SHARE-DIVIDEND> (.15)<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.23<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>101
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MISSOURI CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 51190
<INVESTMENTS-AT-VALUE> 51798
<RECEIVABLES> 1048
<ASSETS-OTHER> 56
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 52902
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 276
<TOTAL-LIABILITIES> 276
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 51648
<SHARES-COMMON-STOCK> 6923<F1>
<SHARES-COMMON-PRIOR> 6474<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 370
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 608
<NET-ASSETS> 52186<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1500<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (232)<F1>
<NET-INVESTMENT-INCOME> 1268<F1>
<REALIZED-GAINS-CURRENT> 375
<APPREC-INCREASE-CURRENT> (1012)
<NET-CHANGE-FROM-OPS> 642
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1268)<F1>
<DISTRIBUTIONS-OF-GAINS> (542)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 631<F1>
<NUMBER-OF-SHARES-REDEEMED> (314)<F1>
<SHARES-REINVESTED> 132<F1>
<NET-CHANGE-IN-ASSETS> 2120
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 543
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 129<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 232<F1>
<AVERAGE-NET-ASSETS> 51741<F1>
<PER-SHARE-NAV-BEGIN> 7.71<F1>
<PER-SHARE-NII> .19<F1>
<PER-SHARE-GAIN-APPREC> (.09)<F1>
<PER-SHARE-DIVIDEND> (.19)<F1>
<PER-SHARE-DISTRIBUTIONS> (.08)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.54<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>104
<NAME> SELIGMAN MUNICIPAL FUND SERIES-MISSOURI CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 51190
<INVESTMENTS-AT-VALUE> 51798
<RECEIVABLES> 1048
<ASSETS-OTHER> 56
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 52902
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 276
<TOTAL-LIABILITIES> 276
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 51648
<SHARES-COMMON-STOCK> 58<F1>
<SHARES-COMMON-PRIOR> 73<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 370
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 608
<NET-ASSETS> 440<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 16<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (5)<F1>
<NET-INVESTMENT-INCOME> 11<F1>
<REALIZED-GAINS-CURRENT> 375
<APPREC-INCREASE-CURRENT> (1012)
<NET-CHANGE-FROM-OPS> 642
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (11)<F1>
<DISTRIBUTIONS-OF-GAINS> (6)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1<F1>
<NUMBER-OF-SHARES-REDEEMED> (18)<F1>
<SHARES-REINVESTED> 2<F1>
<NET-CHANGE-IN-ASSETS> 2120
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 543
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 5<F1>
<AVERAGE-NET-ASSETS> 530<F1>
<PER-SHARE-NAV-BEGIN> 7.72<F1>
<PER-SHARE-NII> .15<F1>
<PER-SHARE-GAIN-APPREC> (.10)<F1>
<PER-SHARE-DIVIDEND> (.15)<F1>
<PER-SHARE-DISTRIBUTIONS> (.08)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.54<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>111
<NAME> SELIGMAN MUNICIPAL FUND SERIES-OREGON CL A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 53694
<INVESTMENTS-AT-VALUE> 54723
<RECEIVABLES> 1101
<ASSETS-OTHER> 4
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 55828
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 211
<TOTAL-LIABILITIES> 211
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 54400
<SHARES-COMMON-STOCK> 7167<F1>
<SHARES-COMMON-PRIOR> 7499<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 188
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1029
<NET-ASSETS> 54240<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1632<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (251)<F1>
<NET-INVESTMENT-INCOME> 1381<F1>
<REALIZED-GAINS-CURRENT> 217
<APPREC-INCREASE-CURRENT> (481)
<NET-CHANGE-FROM-OPS> 1148
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1381)<F1>
<DISTRIBUTIONS-OF-GAINS> (305)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 135<F1>
<NUMBER-OF-SHARES-REDEEMED> (612)<F1>
<SHARES-REINVESTED> 145<F1>
<NET-CHANGE-IN-ASSETS> (3268)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 282
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 140<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 251<F1>
<AVERAGE-NET-ASSETS> 56285<F1>
<PER-SHARE-NAV-BEGIN> 7.65
<PER-SHARE-NII> .19<F1>
<PER-SHARE-GAIN-APPREC> (.04)<F1>
<PER-SHARE-DIVIDEND> (.19)<F1>
<PER-SHARE-DISTRIBUTIONS> (.04)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.57<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>114
<NAME> SELIGMAN MUNICIPAL FUND SERIES-OREGON CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 53694
<INVESTMENTS-AT-VALUE> 54723
<RECEIVABLES> 1101
<ASSETS-OTHER> 4
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 55828
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 211
<TOTAL-LIABILITIES> 211
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 54400
<SHARES-COMMON-STOCK> 182<F1>
<SHARES-COMMON-PRIOR> 201<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 188
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1029
<NET-ASSETS> 1377<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 43<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (13)<F1>
<NET-INVESTMENT-INCOME> 30<F1>
<REALIZED-GAINS-CURRENT> 217
<APPREC-INCREASE-CURRENT> (481)
<NET-CHANGE-FROM-OPS> 1148
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (30)<F1>
<DISTRIBUTIONS-OF-GAINS> (8)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 26<F1>
<NUMBER-OF-SHARES-REDEEMED> (49)<F1>
<SHARES-REINVESTED> 4<F1>
<NET-CHANGE-IN-ASSETS> (3268)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 282
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 13<F1>
<AVERAGE-NET-ASSETS> 1477<F1>
<PER-SHARE-NAV-BEGIN> 7.64
<PER-SHARE-NII> .15<F1>
<PER-SHARE-GAIN-APPREC> (.04)<F1>
<PER-SHARE-DIVIDEND> (.15)<F1>
<PER-SHARE-DISTRIBUTIONS> (.04)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.56<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 48913
<INVESTMENTS-AT-VALUE> 49949
<RECEIVABLES> 897
<ASSETS-OTHER> 246
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 51092
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 377
<TOTAL-LIABILITIES> 377
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 49707
<SHARES-COMMON-STOCK> 6232<F1>
<SHARES-COMMON-PRIOR> 6482<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (28)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1036
<NET-ASSETS> 48418<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1447<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (223)<F1>
<NET-INVESTMENT-INCOME> 1224<F1>
<REALIZED-GAINS-CURRENT> (20)
<APPREC-INCREASE-CURRENT> (432)
<NET-CHANGE-FROM-OPS> 814
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1224)<F1>
<DISTRIBUTIONS-OF-GAINS> (180)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 132<F1>
<NUMBER-OF-SHARES-REDEEMED> (502)<F1>
<SHARES-REINVESTED> 120<F1>
<NET-CHANGE-IN-ASSETS> (2607)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 179
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 126<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 223<F1>
<AVERAGE-NET-ASSETS> 50517<F1>
<PER-SHARE-NAV-BEGIN> 7.87<F1>
<PER-SHARE-NII> .19<F1>
<PER-SHARE-GAIN-APPREC> (.07)<F1>
<PER-SHARE-DIVIDEND> (.19)<F1>
<PER-SHARE-DISTRIBUTIONS> (.03)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.77<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>134
<NAME> SELIGMAN MUNICIPAL FUND SERIES-GEORGIA CL D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 48913
<INVESTMENTS-AT-VALUE> 49949
<RECEIVABLES> 897
<ASSETS-OTHER> 246
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 51092
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 377
<TOTAL-LIABILITIES> 377
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 49707
<SHARES-COMMON-STOCK> 295<F1>
<SHARES-COMMON-PRIOR> 295<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (28)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1036
<NET-ASSETS> 2297<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 61<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (19)<F1>
<NET-INVESTMENT-INCOME> 42<F1>
<REALIZED-GAINS-CURRENT> (20)
<APPREC-INCREASE-CURRENT> (432)
<NET-CHANGE-FROM-OPS> 814
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (42)<F1>
<DISTRIBUTIONS-OF-GAINS> (7)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 68<F1>
<NUMBER-OF-SHARES-REDEEMED> (73)<F1>
<SHARES-REINVESTED> 5<F1>
<NET-CHANGE-IN-ASSETS> (2607)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 179
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 5<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 19<F1>
<AVERAGE-NET-ASSETS> 2156<F1>
<PER-SHARE-NAV-BEGIN> 7.88<F1>
<PER-SHARE-NII> .16<F1>
<PER-SHARE-GAIN-APPREC> (.06)<F1>
<PER-SHARE-DIVIDEND> (.16)<F1>
<PER-SHARE-DISTRIBUTIONS> (.03)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.79<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 101151
<INVESTMENTS-AT-VALUE> 103385
<RECEIVABLES> 1900
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 105285
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 758
<TOTAL-LIABILITIES> 758
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 102100
<SHARES-COMMON-STOCK> 12883<F1>
<SHARES-COMMON-PRIOR> 13400<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 192
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2234
<NET-ASSETS> 101311<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3136<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (438)<F1>
<NET-INVESTMENT-INCOME> 2698<F1>
<REALIZED-GAINS-CURRENT> 194
<APPREC-INCREASE-CURRENT> (1266)
<NET-CHANGE-FROM-OPS> 1686
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2698)<F1>
<DISTRIBUTIONS-OF-GAINS> (1668)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 294<F1>
<NUMBER-OF-SHARES-REDEEMED> (1170)<F1>
<SHARES-REINVESTED> 359<F1>
<NET-CHANGE-IN-ASSETS> (6350)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1708
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 265<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 438<F1>
<AVERAGE-NET-ASSETS> 106341<F1>
<PER-SHARE-NAV-BEGIN> 8.07
<PER-SHARE-NII> .20<F1>
<PER-SHARE-GAIN-APPREC> (.08)<F1>
<PER-SHARE-DIVIDEND> (.20)<F1>
<PER-SHARE-DISTRIBUTIONS> (.13)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.86<F1>
<EXPENSE-RATIO> .82<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> 6-mos
<FISCAL-YEAR-END> SEP-30-1997
<PERIOD-END> MAR-31-1997
<INVESTMENTS-AT-COST> 101151
<INVESTMENTS-AT-VALUE> 103385
<RECEIVABLES> 1900
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 105285
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 758
<TOTAL-LIABILITIES> 758
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 102100
<SHARES-COMMON-STOCK> 409<F1>
<SHARES-COMMON-PRIOR> 337<F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 192
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2234
<NET-ASSETS> 3216<F1>
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 85<F1>
<OTHER-INCOME> 0
<EXPENSES-NET> (25)<F1>
<NET-INVESTMENT-INCOME> 60<F1>
<REALIZED-GAINS-CURRENT> 194
<APPREC-INCREASE-CURRENT> (1266)
<NET-CHANGE-FROM-OPS> 1686
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (60)<F1>
<DISTRIBUTIONS-OF-GAINS> (42)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 88<F1>
<NUMBER-OF-SHARES-REDEEMED> (27)<F1>
<SHARES-REINVESTED> 11<F1>
<NET-CHANGE-IN-ASSETS> (6350)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1708
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 7<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 25<F1>
<AVERAGE-NET-ASSETS> 2917<F1>
<PER-SHARE-NAV-BEGIN> 8.06
<PER-SHARE-NII> .17<F1>
<PER-SHARE-GAIN-APPREC> (.07)<F1>
<PER-SHARE-DIVIDEND> (.17)<F1>
<PER-SHARE-DISTRIBUTIONS> (.13)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.86<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>
