<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000002691
<NAME> LORD ABBETT AFFILIATED FUND, INC.
<SERIES>
<NUMBER> 015
<NAME> CLASS Y
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> OCT-31-2000
<INVESTMENTS-AT-COST> 8,314,774,735
<INVESTMENTS-AT-VALUE> 11,447,037,525
<RECEIVABLES> 60,733,970
<ASSETS-OTHER> 278,895,593
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 11,786,667,088
<PAYABLE-FOR-SECURITIES> 61,756,756
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 300,417,284
<TOTAL-LIABILITIES> 362,174,040
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7,295,123,138
<SHARES-COMMON-STOCK> 3,484,337
<SHARES-COMMON-PRIOR> 2,994,013
<ACCUMULATED-NII-CURRENT> 35,944,539
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 961,162,581
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,132,262,790
<NET-ASSETS> 57,505,624
<DIVIDEND-INCOME> 225,277,509
<INTEREST-INCOME> 27,027,284
<OTHER-INCOME> 0
<EXPENSES-NET> 87,858,248
<NET-INVESTMENT-INCOME> 164,446,545
<REALIZED-GAINS-CURRENT> 963,472,558
<APPREC-INCREASE-CURRENT> 378,816,299
<NET-CHANGE-FROM-OPS> 1,506,735,402
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (991,101)
<DISTRIBUTIONS-OF-GAINS> (5,313,373)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 206,588
<NUMBER-OF-SHARES-REDEEMED> (132,611)
<SHARES-REINVESTED> 416,347
<NET-CHANGE-IN-ASSETS> 1,343,139,267
<ACCUMULATED-NII-PRIOR> 12,690,368
<ACCUMULATED-GAINS-PRIOR> 1,106,502,089
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 32,372,356
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 89,058,466
<AVERAGE-NET-ASSETS> 52,897,725
<PER-SHARE-NAV-BEGIN> 16.25
<PER-SHARE-NII> 0.30
<PER-SHARE-GAIN-APPREC> 2.01
<PER-SHARE-DIVIDEND> (0.30)
<PER-SHARE-DISTRIBUTIONS> (1.76)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.50
<EXPENSE-RATIO> 0.44
</TABLE>