<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000863520
<NAME> LM INSTITUTIONAL FUND ADVISORS I, INC.
<SERIES>
<NUMBER> 31
<NAME> WESTERN ASSET INTERMEDIATE PORTFOLIO - INSTITUTIONAL SHARES
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2001
<PERIOD-START> APR-01-2000
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 443352
<INVESTMENTS-AT-VALUE> 443097
<RECEIVABLES> 18641
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 461738
<PAYABLE-FOR-SECURITIES> 49393
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 618
<TOTAL-LIABILITIES> 50011
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 420051
<SHARES-COMMON-STOCK> 40288
<SHARES-COMMON-PRIOR> 37276
<ACCUMULATED-NII-CURRENT> 110
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (8172)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (262)
<NET-ASSETS> 411727
<DIVIDEND-INCOME> 159
<INTEREST-INCOME> 13649
<OTHER-INCOME> 0
<EXPENSES-NET> 849
<NET-INVESTMENT-INCOME> 12959
<REALIZED-GAINS-CURRENT> 590
<APPREC-INCREASE-CURRENT> 5679
<NET-CHANGE-FROM-OPS> 19228
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (12959)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9867
<NUMBER-OF-SHARES-REDEEMED> (8056)
<SHARES-REINVESTED> 1201
<NET-CHANGE-IN-ASSETS> 35671
<ACCUMULATED-NII-PRIOR> 110
<ACCUMULATED-GAINS-PRIOR> (8762)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 756
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 906
<AVERAGE-NET-ASSETS> 377021
<PER-SHARE-NAV-BEGIN> 10.09
<PER-SHARE-NII> .38
<PER-SHARE-GAIN-APPREC> .13
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (.38)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.22
<EXPENSE-RATIO> .45
</TABLE>
