<PAGE>      PAGE  1
000 B000000 03/31/2008
000 C000000 0000863209
000 D000000 N
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000 F000000 Y
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000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 INVESTORS CASH TRUST
001 B000000 811-6103
001 C000000 2124547190
002 A000000 345 Park Avenue
002 B000000 New York
002 C000000 NY
002 D010000 10154
003  000000 N
004  000000 N
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006  000000 N
007 A000000 Y
007 B000000  1
007 C010200  2
007 C020200 Investors Cash Trust-Treasury Portfolio
007 C030200 N
008 A00AA01 DEUTSCHE INVESTMENT MANAGEMENT AMERICAS INC.
008 B00AA01 A
008 C00AA01 801-252
008 D01AA01 NEW YORK
008 D02AA01 NY
008 D03AA01 10154
010 A00AA01 Deutsche Investment Management Americas Inc.
010 B00AA01 801-252
010 C01AA01 New York
010 C02AA01 NY
010 C03AA01 10154
010 A00AA02 STATE STREET BANK AND TRUST COMPANY
010 B00AA02 85-11329
010 C01AA02 BOSTON
010 C02AA02 MA
010 C03AA02 02110
011 A00AA01 DWS SCUDDER DISTRIBUTORS, INC.
011 B00AA01 8-47765
011 C01AA01 CHICAGO
011 C02AA01 IL
011 C03AA01 60606
012 A00AA01 DWS SCUDDER INVESTMENTS SERVICE COMPANY
012 B00AA01 84-1713
012 C01AA01 KANSAS CITY
012 C02AA01 MO
012 C03AA01 64105
<PAGE>      PAGE  2
012 A00AA02 DST SYSTEMS, INC.
012 B00AA02 84-00448
012 C01AA02 KANSAS CITY
012 C02AA02 MO
012 C03AA02 64105
013 A00AA01 ERNST & YOUNG LLP
013 B01AA01 BOSTON
013 B02AA01 MA
013 B03AA01 02116
014 A00AA01 Alpha Investment Management S.A.M.
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014 A00AA02 AO DB Securities (Kazakhstan)
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014 A00AA03 BT Opera Trading SA
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014 A00AA05 DB International (Asia) Limited
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014 A00AA08 DB UK Bank Limited
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014 A00AA10 Deutsche AlAzizia Financial Services
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014 A00AA20 Deutsche Futures Singapore Pte Ltd
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<PAGE>      PAGE  3
014 A00AA22 DEUTSCHE SECURITIES (INDIA) PRIVATE LIMITED
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014 A00AA23 Deutsche Securities (Proprietary) Limited
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014 A00AA24 DEUTSCHE SECURITIES ASIA LIMITED
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014 A00AA25 Deutsche Securities Asia Limited, Singapore
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014 B00AA26 8-0
014 A00AA27 Deutsche Securities Australia Limited
014 B00AA27 8-031670
014 A00AA28 DEUTSCHE SECURITIES CORREDORES DE BOLSA LTD
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014 A00AA30 Deutsche Securities Israel Ltd.
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014 A00AA31 DEUTSCHE SECURITIES KOREA CO.
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014 A00AA32 Deutsche Securities Limited
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014 A00AA33 Deutsche Securities Menkul Degerler A.S.
014 B00AA33 8-000000
014 A00AA34 Deutsche Securities Sociedad de Bolsa S.A.
014 B00AA34 8-000000
014 A00AA35 Deutsche Securities Venezuela S.A.
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014 A00AA36 Deutsche Securities, S.A.
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014 A00AA37 Deutsche Securities, S.A. de C.V., Bolsa
014 B00AA37 8-000000
014 A00AA38 DMG & PARTNERS SECURITIES PTE LTD
014 B00AA38 8-0
014 A00AA39 DWS SCUDDER DISTRIBUTORS, INC.
014 B00AA39 8-047765
014 A00AA40 K & N Kenanga Holdings Bhd
014 B00AA40 8-000000
014 A00AA41 Kenanga Deutsche Futures Sdn Bhd
014 B00AA41 8-000000
014 A00AA42 Mizuho Corporate Bank (Germany)
014 B00AA42 8-000000
014 A00AA43 OOO Deutsche Bank
014 B00AA43 8-000000
014 A00AA44 PT. Deutsche Securities Indonesia
014 B00AA44 8-000000
014 A00AA45 PT. Deutsche Verdhana Indonesia
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014 A00AA46 Tilney Investment Management
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014 A00AA47 U.F.G.I.S. Capital Management Limited
<PAGE>      PAGE  4
014 B00AA47 8-000000
014 A00AA48 U.F.G.I.S. Structured Holdings Limited
014 B00AA48 8-000000
014 A00AA49 U.F.G.I.S. Trading Limited
014 B00AA49 8-000000
014 A00AA50 UFG (UK) Limited
014 B00AA50 8-000000
014 A00AA51 Yieldbroker Pty Ltd.
014 B00AA51 8-000000
014 A00AA52 ZAO United Financial Group
014 B00AA52 8-000000
014 A00AA53 DB STRATEGIC ADVISORS, INC.
014 B00AA53 8-000000
014 A00AA54 DEUTSCHE SECURITIES SAUDI ARABIA LLC
014 B00AA54 8-000000
014 A00AA55 HANOI BUILDING COMMERCIAL JOINT STOCK BANK
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015 C02AA01 MA
015 C03AA01 02110
015 E01AA01 X
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022 A000001 CREDIT SUISSE (USA) LLC
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022 A000002 CHASE SECURITIES INC.
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022 A000003 BNP PARIBAS
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022 C000003  49136273
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022 A000004 MERRILL LYNCH & CO., INC.
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022 A000005 LEHMAN BROTHERS HOLDINGS, INC.
022 B000005 13-2518466
022 C000005  27786309
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022 A000006 MORGAN STANLEY & CO., INC.
022 B000006 13-2655998
022 C000006  16331441
<PAGE>      PAGE  5
022 D000006         0
022 A000007 BEAR STEARNS & CO.
022 B000007 13-3299429
022 C000007   8100000
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022 A000008 BANC/AMERICA SECURITIES LLC MONTGOMERY
022 B000008 13-4078651
022 C000008   1932454
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022 B000009 13-3175029
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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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078  000000 N
080 A00AA00 ICI Mutual Insurance Company
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<PAGE>      PAGE  11
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SIGNATURE   PAUL SCHUBERT
TITLE       TREASURER