<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000027825
<NAME> DELAWARE GROUP INCOME FUNDS
<SERIES>
<NUMBER> 044
<NAME> DELAWARE CORPORATE BOND FUND INSTITUTIONAL CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> JUL-31-1999
<PERIOD-END> JAN-31-2000
<INVESTMENTS-AT-COST> 62,522,884
<INVESTMENTS-AT-VALUE> 59,326,088
<RECEIVABLES> 1,730,126
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 338,429
<TOTAL-ASSETS> 61,394,643
<PAYABLE-FOR-SECURITIES> 1,121,683
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 0
<TOTAL-LIABILITIES> 1,121,683
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 65,483,427
<SHARES-COMMON-STOCK> 10,816,507
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (2,140,357)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (3,072,110)
<NET-ASSETS> 55,201,497
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2,269,823
<OTHER-INCOME> 0
<EXPENSES-NET> 177,808
<NET-INVESTMENT-INCOME> 2,092,015
<REALIZED-GAINS-CURRENT> (464,151)
<APPREC-INCREASE-CURRENT> (925,354)
<NET-CHANGE-FROM-OPS> 702,510
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1,967,132
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,206,370
<NUMBER-OF-SHARES-REDEEMED> 2,187,795
<SHARES-REINVESTED> 339,631
<NET-CHANGE-IN-ASSETS> 2,155,821
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 149,514
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 318,243
<AVERAGE-NET-ASSETS> 55,751,909
<PER-SHARE-NAV-BEGIN> 5.280
<PER-SHARE-NII> 0.184
<PER-SHARE-GAIN-APPREC> (0.120)
<PER-SHARE-DIVIDEND> 0.184
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 5.160
<EXPENSE-RATIO> 0.550
</TABLE>
