<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000892538
<NAME> SUNAMERICA SERIES TRUST
<SERIES>
<NUMBER> 023
<NAME> SUNAMERICA SERIES TRUST EQUITY INDEX 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> 62,786,934
<INVESTMENTS-AT-VALUE> 67,602,553
<RECEIVABLES> 98,078
<ASSETS-OTHER> 57
<OTHER-ITEMS-ASSETS> 3,957
<TOTAL-ASSETS> 67,704,645
<PAYABLE-FOR-SECURITIES> 7,326
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 85,263
<TOTAL-LIABILITIES> 92,589
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 62,418,930
<SHARES-COMMON-STOCK> 5,534,903
<SHARES-COMMON-PRIOR> 5,344,706
<ACCUMULATED-NII-CURRENT> 238,555
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 138,952
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4,815,619
<NET-ASSETS> 67,612,056
<DIVIDEND-INCOME> 380,065
<INTEREST-INCOME> 23,438
<OTHER-INCOME> 0
<EXPENSES-NET> 183,140
<NET-INVESTMENT-INCOME> 220,363
<REALIZED-GAINS-CURRENT> 24,492
<APPREC-INCREASE-CURRENT> 1,551,465
<NET-CHANGE-FROM-OPS> 1,796,320
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 569,412
<NUMBER-OF-SHARES-REDEEMED> (379,215)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 4,125,222
<ACCUMULATED-NII-PRIOR> 18,192
<ACCUMULATED-GAINS-PRIOR> 114,460
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 136,868
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 183,262
<AVERAGE-NET-ASSETS> 66,962,039
<PER-SHARE-NAV-BEGIN> 11.88
<PER-SHARE-NII> 0.04
<PER-SHARE-GAIN-APPREC> 0.30
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.22
<EXPENSE-RATIO> 0.55
</TABLE>
