<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from the LB
Series Fund, Inc. Semi-Annual Report to Shareholders dated June 30, 2000 and
is qualified in its entirety by reference to such Semi-Annual Report.
</LEGEND>
<SERIES>
<NUMBER> 7
<NAME> LB SERIES FUND, INC. - MID CAP GROWTH PORTFOLIO
</SERIES>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 402,176
<INVESTMENTS-AT-VALUE> 473,937
<RECEIVABLES> 1,999
<ASSETS-OTHER> 94
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 476,030
<PAYABLE-FOR-SECURITIES> 1,121
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 0
<TOTAL-LIABILITIES> 1,121
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 378,053
<SHARES-COMMON-STOCK> 26,859
<SHARES-COMMON-PRIOR> 16,342
<ACCUMULATED-NII-CURRENT> 688
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 24,406
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 71,762
<NET-ASSETS> 474,909
<DIVIDEND-INCOME> 475
<INTEREST-INCOME> 989
<OTHER-INCOME> 0
<EXPENSES-NET> 776
<NET-INVESTMENT-INCOME> 688
<REALIZED-GAINS-CURRENT> 25,103
<APPREC-INCREASE-CURRENT> 15,368
<NET-CHANGE-FROM-OPS> 41,158
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 26,140
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9,251
<NUMBER-OF-SHARES-REDEEMED> 101
<SHARES-REINVESTED> 1,367
<NET-CHANGE-IN-ASSETS> 203,238
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 25,443
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 776
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 776
<AVERAGE-NET-ASSETS> 389,888
<PER-SHARE-NAV-BEGIN> 16.62
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> 2.37
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 1.34
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 17.68
<EXPENSE-RATIO> 0.40
</TABLE>
