WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000764624
<NAME> Municipal High Income Fund
<SERIES>
<NUMBER>004
<NAME>Smith Barney Income Fund
<S> <C>
<PERIOD-TYPE> Year
<FISCAL-YEAR-END> Jul-31-2000
<PERIOD-END> Jul-31-2000
<INVESTMENTS-AT-COST> 528,162,309
<INVESTMENTS-AT-VALUE> 499,330,299
<RECEIVABLES> 7,316,327
<ASSETS-OTHER> 32,645
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 506,679,271
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 938,896
<TOTAL-LIABILITIES> 938,896
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 534,665,722
<SHARES-COMMON-STOCK> 19,189,602
<SHARES-COMMON-PRIOR> 17,027,134
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (93,337)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (28,832,010)
<NET-ASSETS> 505,740,375
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 38,647,321
<OTHER-INCOME> 0
<EXPENSES-NET> 6,021,670
<NET-INVESTMENT-INCOME> 32,625,651
<REALIZED-GAINS-CURRENT> 329,605
<APPREC-INCREASE-CURRENT> (43,964,777)
<NET-CHANGE-FROM-OPS> (11,009,521)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 16,371,977
<DISTRIBUTIONS-OF-GAINS> 1,023,688
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6,210,063
<NUMBER-OF-SHARES-REDEEMED> 4,708,841
<SHARES-REINVESTED> 661,246
<NET-CHANGE-IN-ASSETS> (140,005,615)
<ACCUMULATED-NII-PRIOR> (1,245,038)
<ACCUMULATED-GAINS-PRIOR> 1,549,019
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3,348,219
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 6,021,670
<AVERAGE-NET-ASSETS> 287,707,614
<PER-SHARE-NAV-BEGIN> 16.980
<PER-SHARE-NII> 0.920
<PER-SHARE-GAIN-APPREC> (1.120)
<PER-SHARE-DIVIDEND> 0.950
<PER-SHARE-DISTRIBUTIONS> 0.050
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 15.780
<EXPENSE-RATIO> 0.84
</TABLE>