<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from the Kemper
Municipal Bond Fund Semiannual Report for the fiscal year ended 3/31/00 and is
qualified in its entirety by reference to such financial statements.
</LEGEND>
<CIK> 0000055190
<NAME> KEMPER MUNICIPAL BOND FUND
<SERIES>
<NUMBER> 001
<NAME> KEMPER NATIONAL TAX-FREE INCOME SERIES
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> MAR-31-2000
<INVESTMENTS-AT-COST> 2,568,327
<INVESTMENTS-AT-VALUE> 2,625,057
<RECEIVABLES> 100,134
<ASSETS-OTHER> 4,365
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2,729,557
<PAYABLE-FOR-SECURITIES> 77,312
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 7,273
<TOTAL-LIABILITIES> 84,584
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2,670,982
<SHARES-COMMON-STOCK> 268,557
<SHARES-COMMON-PRIOR> 284,064
<ACCUMULATED-NII-CURRENT> (4)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (82,740)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 56,730
<NET-ASSETS> 2,644,972
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 80,285
<OTHER-INCOME> 0
<EXPENSES-NET> 9,632
<NET-INVESTMENT-INCOME> 70,653
<REALIZED-GAINS-CURRENT> (38,279)
<APPREC-INCREASE-CURRENT> 19,136
<NET-CHANGE-FROM-OPS> 51,509
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (68,822)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 371,068
<NUMBER-OF-SHARES-REDEEMED> (561,917)
<SHARES-REINVESTED> 43,018
<NET-CHANGE-IN-ASSETS> (167,231)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (44,461)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 5,527
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 9,750
<AVERAGE-NET-ASSETS> 2,611,461
<PER-SHARE-NAV-BEGIN> 9.60
<PER-SHARE-NII> .25
<PER-SHARE-GAIN-APPREC> (.06)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (.25)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.54
<EXPENSE-RATIO> .69
</TABLE>
