TIAA CREF INSTITUTIONAL MUTUAL FUNDS
NSAR-B, 1999-11-30
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<PAGE>      PAGE  1
000 B000000 09/30/1999
000 C000000 0001084380
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 Y
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 TIAA-CREF INSTITUTIONAL FUNDS
001 B000000 811-09301
001 C000000 8002231200
002 A000000 730 THIRD AVENUE
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10017
002 D020000 3206
003  000000 Y
004  000000 N
005  000000 N
006  000000 N
007 A000000 Y
007 B000000  7
007 C010100  1
007 C020100 TIAA-CREF INSTITUTIONAL INTL EQUITY FUND
007 C030100 N
007 C010200  2
007 C020200 TIAA-CREF INSTITUTIONAL GROWTH EQUITY FUND
007 C030200 N
007 C010300  3
007 C020300 TIAA-CREF INSTITUTIONAL GROWTH AND INCOME
007 C030300 N
007 C010400  4
007 C020400 TIAA-CREF INSTITUTIONAL EQUITY INDEX FUND
007 C030400 N
007 C010500  5
007 C020500 TIAA-CREF INSTITUTIONAL SOCIAL CHOICE EQUITY
007 C030500 N
007 C010600  6
007 C020600 TIAA-CREF INSTITUTIONAL BOND FUND
007 C030600 N
007 C010700  7
007 C020700 TIAA-CREF INSTITUTIONAL MONEY MARKET FUND
007 C030700 N
007 C010800  8
007 C010900  9
007 C011000 10
007 C011100 11
007 C011200 12
007 C011300 13
007 C011400 14
<PAGE>      PAGE  2
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007 C012600 26
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007 C012900 29
007 C013000 30
008 A00AA01 TEACHERS ADVISORS INC
008 B00AA01 A
008 C00AA01 801-46887
008 D01AA01 NEW YORK
008 D02AA01 NY
008 D03AA01 10017
010 A00AA01 STATE STREET BANK AND TRUST COMPANY
010 B00AA01 85-05003
010 C01AA01 BOSTON
010 C02AA01 MA
010 C03AA01 02210
011 A00AA01 TEACHERS PERSONAL INVESTORS SERVICES, INC.
011 B00AA01 8-47051
011 C01AA01 NEW YORK
011 C02AA01 NY
011 C03AA01 10017
011 A00AA02 TIAA-CREF INDIVIDUAL & INSTIT SERVICES, INC.
011 B00AA02 8-44454
011 C01AA02 NEW YORK
011 C02AA02 NY
011 C03AA02 10017
012 A00AA01 STATE STREET BANK AND TRUST COMPANY
012 B00AA01 85-05003
012 C01AA01 BOSTON
012 C02AA01 MA
012 C03AA01 02210
013 A00AA01 ERNST & YOUNG, L.L.P.
013 B01AA01 NEW YORK
013 B02AA01 NY
013 B03AA01 10019
014 A00AA01 TEACHERS PERSONAL INVESTORS SERVICES, INC.
014 B00AA01 8-47051
014 A00AA02 TIAA-CREF INDIVIDUAL & INSTIT SERVICES, INC.
014 B00AA02 8-44454
018  00AA00 Y
<PAGE>      PAGE  3
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<PAGE>      PAGE  4
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<PAGE>      PAGE  5
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<PAGE>      PAGE  6
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<PAGE>      PAGE  7
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<PAGE>      PAGE  8
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<PAGE>      PAGE  9
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<PAGE>      PAGE  10
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<PAGE>      PAGE  11
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<PAGE>      PAGE  12
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<PAGE>      PAGE  13
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<PAGE>      PAGE  14
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<PAGE>      PAGE  15
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<PAGE>      PAGE  16
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<PAGE>      PAGE  17
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<PAGE>      PAGE  18
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015 C010304 FRANKFURT
015 D010304 GERMANY
015 E040304 X
015 A000305 STANDARD CHARTERED BANK
015 B000305 S
015 C010305 HONG KONG
015 D010305 HONG KONG
015 E040305 X
015 A000306 THE DAIWA BANK, LIMITED
015 B000306 S
015 C010306 TOKYO
015 D010306 JAPAN
015 E040306 X
015 A000307 STATE STREET BANK AND TRUST COMPANY
015 B000307 S
015 C010307 LONDON
015 D010307 UNITED KINGDOM
015 E040307 X
015 A000308 ANZ BANKING GROUP (NZ) LIMITED
015 B000308 S
015 C010308 WELLINGTON
015 D010308 NEW ZEALAND
015 E040308 X
015 A000309 CITIBANK GRUPO FINANCERO CITIBANK
015 B000309 S
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015 D010309 MEXICO
<PAGE>      PAGE  19
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<PAGE>      PAGE  20
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<PAGE>      PAGE  21
066 F000300 N
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<PAGE>      PAGE  22
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<PAGE>      PAGE  23
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015 A000401 STATE STREET BANK AND TRUST COMPANY
015 B000401 C
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015 C030401 02105
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<PAGE>      PAGE  24
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<PAGE>      PAGE  25
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<PAGE>      PAGE  26
070 N010400 Y
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<PAGE>      PAGE  27
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015 A000501 STATE STREET BANK AND TRUST CO
015 B000501 C
015 C010501 BOSTON
015 C020501 MA
015 C030501 02105
015 E010501 X
024  000500 Y
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025 B000501 94-1687665
025 C000501 E
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025 A000502 CHASE MANHATTAN CORP
025 B000502 13-3112953
025 C000502 E
025 D000502     211
025 A000503 JP MORGAN
025 B000503 13-3224016
025 C000503 E
<PAGE>      PAGE  28
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<PAGE>      PAGE  29
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<PAGE>      PAGE  30
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<PAGE>      PAGE  31
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<PAGE>      PAGE  32
076  000500     0.00
015 A000601 STATE STREET BANK AND TRUST CO
015 B000601 C
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015 C020601 MA
015 C030601 02105
015 E010601 X
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<PAGE>      PAGE  33
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<PAGE>      PAGE  34
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<PAGE>      PAGE  35
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<PAGE>      PAGE  36
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015 A000701 STATE STREET BANK AND TRUST CO
015 B000701 C
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<PAGE>      PAGE  37
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048 G010700        0
048 G020700 0.000
048 H010700        0
048 H020700 0.000
048 I010700        0
048 I020700 0.000
048 J010700        0
048 J020700 0.000
048 K010700        0
048 K020700 0.000
058 A000700 N
059  000700 Y
060 A000700 Y
060 B000700 Y
061  000700        0
062 A000700 Y
062 B000700   0.0
062 C000700  34.2
062 D000700   0.0
062 E000700   0.0
062 F000700   0.0
062 G000700   0.0
062 H000700   0.0
062 I000700  66.0
062 J000700   0.0
062 K000700   0.0
062 L000700   0.0
062 M000700   0.0
062 N000700   0.0
062 O000700   0.0
062 P000700   0.0
062 Q000700   0.0
062 R000700   0.0
063 A000700  48
063 B000700  0.0
064 A000700 N
064 B000700 N
066 A000700 N
067  000700 N
068 A000700 N
068 B000700 N
069  000700 N
070 A010700 Y
070 A020700 N
070 B010700 Y
070 B020700 N
070 C010700 Y
070 C020700 N
070 D010700 Y
<PAGE>      PAGE  38
070 D020700 N
070 E010700 Y
070 E020700 N
070 F010700 Y
070 F020700 N
070 G010700 Y
070 G020700 N
070 H010700 Y
070 H020700 N
070 I010700 Y
070 I020700 N
070 J010700 Y
070 J020700 N
070 K010700 Y
070 K020700 N
070 L010700 Y
070 L020700 N
070 M010700 Y
070 M020700 N
070 N010700 Y
070 N020700 N
070 O010700 Y
070 O020700 N
070 P010700 N
070 P020700 N
070 Q010700 Y
070 Q020700 N
070 R010700 Y
070 R020700 N
071 A000700    183887
071 B000700         0
071 C000700     25222
071 D000700    0
072 A000700  4
072 B000700      390
072 C000700        0
072 D000700        0
072 E000700        0
072 F000700        8
072 G000700       21
072 H000700        0
072 I000700        5
072 J000700       21
072 K000700        0
072 L000700        3
072 M000700        1
072 N000700        1
072 O000700        0
072 P000700        0
072 Q000700        0
072 R000700       22
<PAGE>      PAGE  39
072 S000700        4
072 T000700        0
072 U000700        0
072 V000700        0
072 W000700        1
072 X000700       86
072 Y000700       74
072 Z000700      378
072AA000700        0
072BB000700        0
072CC010700        0
072CC020700        0
072DD010700      378
072DD020700        0
072EE000700        0
073 A010700   0.0200
073 A020700   0.0000
073 B000700   0.0000
073 C000700   0.0000
074 A000700        5
074 B000700        0
074 C000700    25427
074 D000700        0
074 E000700        0
074 F000700        0
074 G000700        0
074 H000700        0
074 I000700        0
074 J000700        0
074 K000700        0
074 L000700        0
074 M000700        0
074 N000700    25432
074 O000700        0
074 P000700        0
074 Q000700        0
074 R010700        0
074 R020700        0
074 R030700        0
074 R040700       54
074 S000700        0
074 T000700    25378
074 U010700    25378
074 U020700        0
074 V010700     1.00
074 V020700     0.00
074 W000700   0.9999
074 X000700        2
074 Y000700        0
075 A000700    24913
075 B000700        0
<PAGE>      PAGE  40
076  000700     0.00
SIGNATURE   CAROLYN THOMSON
TITLE       FUND ADMIN MGR


WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0001084380
<NAME> TIAA-CREF INSTITUTIONAL MUTUAL FUNDS
<SERIES>
   <NUMBER> 1
   <NAME> INSTITUTIONAL INTERNATIONAL EQUITY

<S>                             <C>
<PERIOD-TYPE>                   4-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               SEP-30-1999
<INVESTMENTS-AT-COST>                         25678816
<INVESTMENTS-AT-VALUE>                        27173827
<RECEIVABLES>                                   816321
<ASSETS-OTHER>                                  276145
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                28266293
<PAYABLE-FOR-SECURITIES>                        674470
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       119660
<TOTAL-LIABILITIES>                             794130
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      25801641
<SHARES-COMMON-STOCK>                          2576163
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                        93742
<OVERDISTRIBUTION-NII>                               0
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<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       1494845
<NET-ASSETS>                                  27472163
<DIVIDEND-INCOME>                               103909
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<EXPENSES-NET>                                   22607
<NET-INVESTMENT-INCOME>                         115059
<REALIZED-GAINS-CURRENT>                         60618
<APPREC-INCREASE-CURRENT>                      1494845
<NET-CHANGE-FROM-OPS>                          1670522
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        2644554
<NUMBER-OF-SHARES-REDEEMED>                      68391
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                        27472163
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            21048
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 100180
<AVERAGE-NET-ASSETS>                          25875094
<PER-SHARE-NAV-BEGIN>                               10
<PER-SHARE-NII>                                   0.04
<PER-SHARE-GAIN-APPREC>                           0.62
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.66
<EXPENSE-RATIO>                                   0.09
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0001084380
<NAME> TIAA-CREF INSTITUTIONAL MUTUAL FUNDS
<SERIES>
   <NUMBER> 2
   <NAME> INSTITUTIONAL GROWTH EQUITY FUND

<S>                             <C>
<PERIOD-TYPE>                   4-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               SEP-30-1999
<INVESTMENTS-AT-COST>                         30080664
<INVESTMENTS-AT-VALUE>                        31039631
<RECEIVABLES>                                   133371
<ASSETS-OTHER>                                    4384
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                31177386
<PAYABLE-FOR-SECURITIES>                         76396
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       566319
<TOTAL-LIABILITIES>                             642715
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      30045963
<SHARES-COMMON-STOCK>                          3010648
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                        55696
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                       (525955)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        958967
<NET-ASSETS>                                  30534671
<DIVIDEND-INCOME>                                46202
<INTEREST-INCOME>                                28172
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   18678
<NET-INVESTMENT-INCOME>                          55696
<REALIZED-GAINS-CURRENT>                      (525955)
<APPREC-INCREASE-CURRENT>                       958967
<NET-CHANGE-FROM-OPS>                           488708
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        3387439
<NUMBER-OF-SHARES-REDEEMED>                     376791
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                        30534671
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            19527
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  99240
<AVERAGE-NET-ASSETS>                          28203331
<PER-SHARE-NAV-BEGIN>                               10
<PER-SHARE-NII>                                   0.02
<PER-SHARE-GAIN-APPREC>                           0.12
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                             10.140
<EXPENSE-RATIO>                                    .07
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0001084380
<NAME> TIAA-CREF INSTITUTIONAL MUTUAL FUNDS
<SERIES>
   <NUMBER> 3
   <NAME> INSTITUTIONAL GROWTH AND INCOME FUND

<S>                             <C>
<PERIOD-TYPE>                   4-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               SEP-30-1999
<INVESTMENTS-AT-COST>                         26398167
<INVESTMENTS-AT-VALUE>                        25781175
<RECEIVABLES>                                   164354
<ASSETS-OTHER>                                    6529
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                25952058
<PAYABLE-FOR-SECURITIES>                        704184
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        73627
<TOTAL-LIABILITIES>                             777811
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      25804223
<SHARES-COMMON-STOCK>                          2580060
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                         2396
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (15032)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                      (617340)
<NET-ASSETS>                                  25174247
<DIVIDEND-INCOME>                                85959
<INTEREST-INCOME>                                22811
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   16946
<NET-INVESTMENT-INCOME>                          91824
<REALIZED-GAINS-CURRENT>                       (14904)
<APPREC-INCREASE-CURRENT>                     (617340)
<NET-CHANGE-FROM-OPS>                         (540420)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        89556
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        3159292
<NUMBER-OF-SHARES-REDEEMED>                     586384
<SHARES-REINVESTED>                               7152
<NET-CHANGE-IN-ASSETS>                        25174247
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            17716
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  96771
<AVERAGE-NET-ASSETS>                          25566990
<PER-SHARE-NAV-BEGIN>                               10
<PER-SHARE-NII>                                   0.04
<PER-SHARE-GAIN-APPREC>                         (0.25)
<PER-SHARE-DIVIDEND>                            (0.03)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.76
<EXPENSE-RATIO>                                   0.07
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0001084380
<NAME> TIAA-CREF INSTITUTIONAL MUTUAL FUNDS
<SERIES>
   <NUMBER> 4
   <NAME> INSTITUTIONAL EQUITY INDEX FUND

<S>                             <C>
<PERIOD-TYPE>                   4-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               SEP-30-1999
<INVESTMENTS-AT-COST>                         25653494
<INVESTMENTS-AT-VALUE>                        24887119
<RECEIVABLES>                                   155642
<ASSETS-OTHER>                                  173686
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                25216447
<PAYABLE-FOR-SECURITIES>                         98728
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        54037
<TOTAL-LIABILITIES>                             152765
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      25675150
<SHARES-COMMON-STOCK>                          2567842
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                        98672
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          56235
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                      (766375)
<NET-ASSETS>                                  25063682
<DIVIDEND-INCOME>                                94842
<INTEREST-INCOME>                                16925
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   13095
<NET-INVESTMENT-INCOME>                          98672
<REALIZED-GAINS-CURRENT>                         56235
<APPREC-INCREASE-CURRENT>                     (766375)
<NET-CHANGE-FROM-OPS>                         (611468)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        2596809
<NUMBER-OF-SHARES-REDEEMED>                      28967
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                        25063682
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            13865
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  92920
<AVERAGE-NET-ASSETS>                          25567655
<PER-SHARE-NAV-BEGIN>                               10
<PER-SHARE-NII>                                   0.04
<PER-SHARE-GAIN-APPREC>                         (0.28)
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.76
<EXPENSE-RATIO>                                   0.05
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0001084380
<NAME> TIAA-CREF INSTITUTIONAL MUTUAL FUNDS
<SERIES>
   <NUMBER> 5
   <NAME> INSTITUTIONAL SOCIAL CHOICE EQUITY FUND

<S>                             <C>
<PERIOD-TYPE>                   4-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               SEP-30-1999
<INVESTMENTS-AT-COST>                         25411809
<INVESTMENTS-AT-VALUE>                        24968133
<RECEIVABLES>                                    23565
<ASSETS-OTHER>                                    1405
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                24993103
<PAYABLE-FOR-SECURITIES>                        208116
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        54240
<TOTAL-LIABILITIES>                             262356
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      25085650
<SHARES-COMMON-STOCK>                          2508015
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                        94101
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         (5328)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                      (443676)
<NET-ASSETS>                                  24730747
<DIVIDEND-INCOME>                                91519
<INTEREST-INCOME>                                16469
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   13887
<NET-INVESTMENT-INCOME>                          94101
<REALIZED-GAINS-CURRENT>                        (5328)
<APPREC-INCREASE-CURRENT>                     (443676)
<NET-CHANGE-FROM-OPS>                         (354903)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        2578233
<NUMBER-OF-SHARES-REDEEMED>                      70218
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                        24730747
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            14659
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  93725
<AVERAGE-NET-ASSETS>                          25610640
<PER-SHARE-NAV-BEGIN>                               10
<PER-SHARE-NII>                                   0.04
<PER-SHARE-GAIN-APPREC>                         (0.18)
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.86
<EXPENSE-RATIO>                                   0.05
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0001084380
<NAME> TIAA-CREF INSTITUTIONAL MUTUAL FUNDS
<SERIES>
   <NUMBER> 6
   <NAME> INSTITUTIONAL BOND FUND

<S>                             <C>
<PERIOD-TYPE>                   4-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               SEP-30-1999
<INVESTMENTS-AT-COST>                         35485265
<INVESTMENTS-AT-VALUE>                        35424958
<RECEIVABLES>                                  6366694
<ASSETS-OTHER>                                    7074
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                41798726
<PAYABLE-FOR-SECURITIES>                      10856026
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       588840
<TOTAL-LIABILITIES>                           11444866
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      30419874
<SHARES-COMMON-STOCK>                          3043968
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                          403
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         (6110)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       (60307)
<NET-ASSETS>                                  30353860
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               486594
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   15265
<NET-INVESTMENT-INCOME>                         471329
<REALIZED-GAINS-CURRENT>                        (6110)
<APPREC-INCREASE-CURRENT>                      (60307)
<NET-CHANGE-FROM-OPS>                           404912
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       470926
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        3196195
<NUMBER-OF-SHARES-REDEEMED>                     194145
<SHARES-REINVESTED>                              41918
<NET-CHANGE-IN-ASSETS>                        30353860
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            14462
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  93794
<AVERAGE-NET-ASSETS>                          26676901
<PER-SHARE-NAV-BEGIN>                               10
<PER-SHARE-NII>                                   0.17
<PER-SHARE-GAIN-APPREC>                         (0.03)
<PER-SHARE-DIVIDEND>                            (0.17)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.97
<EXPENSE-RATIO>                                   0.06
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0001084380
<NAME> TIAA-CREF INSTITUTIONAL MUTUAL FUNDS
<SERIES>
   <NUMBER> 7
   <NAME> INSTITUTIONAL MONEY MARKET FUND

<S>                             <C>
<PERIOD-TYPE>                   4-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               SEP-30-1999
<INVESTMENTS-AT-COST>                         25426861
<INVESTMENTS-AT-VALUE>                        25426861
<RECEIVABLES>                                        0
<ASSETS-OTHER>                                    4975
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                25431836
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        53671
<TOTAL-LIABILITIES>                              53671
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      25378165
<SHARES-COMMON-STOCK>                         25378165
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                  25378165
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               390078
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   12013
<NET-INVESTMENT-INCOME>                         378065
<REALIZED-GAINS-CURRENT>                             0
<APPREC-INCREASE-CURRENT>                            0
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