<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000798250
<NAME> MFS SERIES TRUST II
<SERIES>
<NUMBER> 014
<NAME> MFS EMERGING GROWTH FUND CLASS I
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-2000
<PERIOD-START> DEC-01-1999
<PERIOD-END> MAY-31-2000
<INVESTMENTS-AT-COST> 9610716819
<INVESTMENTS-AT-VALUE> 19929441533
<RECEIVABLES> 78231013
<ASSETS-OTHER> 113147318
<OTHER-ITEMS-ASSETS> 367224
<TOTAL-ASSETS> 20121187088
<PAYABLE-FOR-SECURITIES> 15904995
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 563184739
<TOTAL-LIABILITIES> 579089734
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 8918669593
<SHARES-COMMON-STOCK> 2813984
<SHARES-COMMON-PRIOR> 1842938
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (132978319)
<ACCUMULATED-NET-GAINS> 430360122
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 10326045958
<NET-ASSETS> 19542097354
<DIVIDEND-INCOME> 5969724
<INTEREST-INCOME> 10307994
<OTHER-INCOME> (124293)
<EXPENSES-NET> (149017818)
<NET-INVESTMENT-INCOME> (132864393)
<REALIZED-GAINS-CURRENT> 444600900
<APPREC-INCREASE-CURRENT> 2038278368
<NET-CHANGE-FROM-OPS> 2350014875
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (600026)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1941687
<NUMBER-OF-SHARES-REDEEMED> (980399)
<SHARES-REINVESTED> 9758
<NET-CHANGE-IN-ASSETS> 3559237247
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 80525191
<OVERDISTRIB-NII-PRIOR> (113926)
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 66305562
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 149815168
<AVERAGE-NET-ASSETS> 19926727678
<PER-SHARE-NAV-BEGIN> 55.45
<PER-SHARE-NII> (0.22)
<PER-SHARE-GAIN-APPREC> 8.47
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.31)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 63.39
<EXPENSE-RATIO> 0.83
</TABLE>
