<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE C0NTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE KEMPER
MUNICIPAL BOND FUND ANNUAL REPORT FOR THE FISCAL YEAR ENDED 09/30/00 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000055190
<NAME> KEMPER NATIONAL TAX-FREE INCOME SERIES
<SERIES>
<NUMBER> 003
<NAME> KEMPER MUNICIPAL BOND FUND
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 2,403,878,790
<INVESTMENTS-AT-VALUE> 2,489,837,041
<RECEIVABLES> 39,447,859
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2,529,284,900
<PAYABLE-FOR-SECURITIES> 5,287,903
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 5,843,202
<TOTAL-LIABILITIES> 11,131,105
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2,521,384,558
<SHARES-COMMON-STOCK> 801,480
<SHARES-COMMON-PRIOR> 975,189
<ACCUMULATED-NII-CURRENT> 354,907
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (89,543,921)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 85,958,251
<NET-ASSETS> 2,518,153,795
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 156,129,735
<OTHER-INCOME> 0
<EXPENSES-NET> 18,924,115
<NET-INVESTMENT-INCOME> 137,205,620
<REALIZED-GAINS-CURRENT> (45,083,371)
<APPREC-INCREASE-CURRENT> 48,363,251
<NET-CHANGE-FROM-OPS> 140,485,500
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (398,270)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 51,378,041
<NUMBER-OF-SHARES-REDEEMED> (53,470,721)
<SHARES-REINVESTED> 265,174
<NET-CHANGE-IN-ASSETS> (294,049,205)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (44,461,000)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 10,795,156
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 19,156,898
<AVERAGE-NET-ASSETS> 8,998,675
<PER-SHARE-NAV-BEGIN> 9.62
<PER-SHARE-NII> .43
<PER-SHARE-GAIN-APPREC> .01
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (.42)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.64
<EXPENSE-RATIO> 1.53
</TABLE>
