<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000892538
<NAME> SUNAMERICA SERIES TRUST
<SERIES>
<NUMBER> 003
<NAME> SUNAMERICA SERIES TRUST MFS GROWTH AND INCOME PORTFOLIO
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> JAN-31-2001
<PERIOD-START> FEB-01-2000
<PERIOD-END> JUL-31-2000
<INVESTMENTS-AT-COST> 330,587,511
<INVESTMENTS-AT-VALUE> 356,255,948
<RECEIVABLES> 4,923,582
<ASSETS-OTHER> 3,292
<OTHER-ITEMS-ASSETS> 34,609
<TOTAL-ASSETS> 361,217,431
<PAYABLE-FOR-SECURITIES> 1,847,614
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,252,133
<TOTAL-LIABILITIES> 3,099,747
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 323,831,108
<SHARES-COMMON-STOCK> 26,040,312
<SHARES-COMMON-PRIOR> 25,251,329
<ACCUMULATED-NII-CURRENT> 2,983,247
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 5,635,898
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 25,667,431
<NET-ASSETS> 358,117,684
<DIVIDEND-INCOME> 1,890,254
<INTEREST-INCOME> 438,791
<OTHER-INCOME> 0
<EXPENSES-NET> 1,324,231
<NET-INVESTMENT-INCOME> 1,004,814
<REALIZED-GAINS-CURRENT> 8,415,839
<APPREC-INCREASE-CURRENT> 512,498
<NET-CHANGE-FROM-OPS> 9,933,151
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,916,712
<NUMBER-OF-SHARES-REDEEMED> (3,127,729)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 20,896,081
<ACCUMULATED-NII-PRIOR> 1,978,433
<ACCUMULATED-GAINS-PRIOR> (2,779,941)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,231,104
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,325,531
<AVERAGE-NET-ASSETS> 353,676,521
<PER-SHARE-NAV-BEGIN> 13.35
<PER-SHARE-NII> 0.04
<PER-SHARE-GAIN-APPREC> 0.36
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 13.75
<EXPENSE-RATIO> 0.75
</TABLE>
