DREYFUS INSTITUTIONAL MONEY MARKET FUND INC
NSAR-A, 1996-08-27
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<PAGE>      PAGE  1
000 A000000 06/30/96
000 C000000 315783
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 U
001 A000000 DREYFUS INSTITUTIONAL MONEY MARKET FUND
001 B000000 811-3025
001 C000000 2129226807
002 A000000 144 GLENN CURTISS BOULEVARD
002 B000000 UNIONDALE
002 C000000 NY
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002 D020000 0144
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004  000000 N
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007 C030100 N
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007 C010500  5
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015 A00AA01 THE BANK OF NEW YORK
015 B00AA01 C
015 C01AA01 NEW YORK
015 C02AA01 NY
015 C03AA01 10286
015 E01AA01 X
018  00AA00 Y
019 A00AA00 Y
019 B00AA00  161
019 C00AA00 DREYFUSFAM
022 A000001 AUBREY G. LANSTON & CO. INC.
022 B000001 13-5552129
022 C000001   3445075
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022 A000002 SBC CAPITAL MARKETS, INC.
022 B000002 13-3498485
022 C000002   2456993
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022 A000003 UBS SECURITIES INC.
022 B000003 13-2932996
022 C000003   2098665
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022 A000004 THE NIKKO SECURITIES CO. INTERNATIONAL, INC.
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022 A000005 DAIWA SECURITIES AMERICA INC.
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022 A000006 LEHMAN BROTHERS INC.
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022 C000006   1112409
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022 A000007 MORGAN STANLEY & CO. INCORPORATED
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022 C000007    915000
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022 A000008 GOLDMAN, SACHS & CO.
022 B000008 13-5108880
022 C000008    800547
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022 A000009 REPUBLIC NATIONAL BANK OF NEW YORK
022 B000009 13-2774727
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022 B000010 36-2880742
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SIGNATURE   DOUGLAS C. CONROY                            
TITLE       ASSISTANT TREASURER 
 


<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000315783
<NAME> DREYFUS INSTITUTIONAL MONEY MARKET FUND
<SERIES>
   <NUMBER> 01
   <NAME> MONEY MARKET SERIES
<MULTIPLIER> 1000
       
<S>                             <C>
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000315783
<NAME> DRYEFUS INSTITUTIONAL MONEY MARKET FUND
<SERIES>
   <NUMBER> 02
   <NAME> GOVERNMENT SECURITIES SERIES
<MULTIPLIER> 1000
       
<S>                             <C>
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</TABLE>


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