VUSXX Vanguard Admiral Fund Treasury Money Market Fund (MM)

000 A000000 02/29/2008
000 C000000 0000891190
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 U
001 A000000 VANGUARD ADMIRAL FUNDS
001 B000000 811-7043
001 C000000 6106691000
002 A000000 100 VANGUARD BOULEVARD
002 B000000 MALVERN
002 C000000 PA
002 D010000 19355
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 1
007 C010100 1
007 C020100 VANGUARD ADMIRAL TREASURY MONEY MARKET FUND
007 C030100 N
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A00AA01 THE VANGUARD GROUP, INC.
008 B00AA01 A
008 C00AA01 801-49601
008 D01AA01 MALVERN
008 D02AA01 PA
008 D03AA01 19355
010 A00AA01 THE VANGUARD GROUP, INC.
010 B00AA01 801-11953
010 C01AA01 MALVERN
010 C02AA01 PA
010 C03AA01 19355
011 A00AA01 VANGUARD MARKETING CORP.
011 B00AA01 8-21570
011 C01AA01 MALVERN
011 C02AA01 PA
011 C03AA01 19355
012 A00AA01 THE VANGUARD GROUP, INC.

012 B00AA01 84-772
012 C01AA01 MALVERN
012 C02AA01 PA
012 C03AA01 19355
013 A00AA01 PRICEWATERHOUSECOOPERS LLP
013 B01AA01 PHILADELPHIA
013 B02AA01 PA
013 B03AA01 19103
014 A00AA01 VANGUARD MARKETING CORP.
014 B00AA01 8-21570
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 151
019 C00AA00 VANGUARDGR
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 J.P.MORGAN SECURITIES INC.
022 B000001 13-3224016
022 C000001 42218605
022 D000001 9069742
022 A000002 UBS SECURITIES LLC
022 B000002 13-3873456
022 C000002 13565634
022 D000002 802728
022 A000003 DEUTSCHE BANK SECURITIES INC.
022 B000003 13-2730828
022 C000003 8964362
022 D000003 982564
022 A000004 LEHMAN BROTHERS INC.
022 B000004 13-2518466
022 C000004 4865629
022 D000004 2380272
022 A000005 HSBC SECURITIES (USA) INC.
022 B000005 13-2650272
022 C000005 5860887
022 D000005 1365947
022 A000006 BANC OF AMERICA SECURITIES LLC
022 B000006 56-2058405
022 C000006 2597344
022 D000006 2895247
022 A000007 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
022 B000007 13-5674085

022 C000007 3820341
022 D000007 1060004
022 A000008 BARCLAYS CAPITAL INC.
022 B000008 13-3410233
022 C000008 2258757
022 D000008 459296
022 A000009 MIZUHO SECURITIES USA INC.
022 B000009 36-2880742
022 C000009 1156883
022 D000009 904253
022 A000010 GREENWICH CAPITAL MARKETS, INC.
022 B000010 13-3172275
022 C000010 1096853
022 D000010 747349
023 C000000 90105079
023 D000000 22016307
024 00AA00 N
025 D00AA01 0
025 D00AA02 0
025 D00AA03 0
025 D00AA04 0
025 D00AA05 0
025 D00AA06 0
025 D00AA07 0
025 D00AA08 0
026 A000000 N
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
029 00AA00 N
030 A00AA00 0
030 B00AA00 0.00
030 C00AA00 0.00
031 A00AA00 0
031 B00AA00 0
032 00AA00 0
033 00AA00 0
034 00AA00 N
035 00AA00 0
036 B00AA00 0
037 00AA00 N
038 00AA00 0
039 00AA00 N
040 00AA00 N
042 A00AA00 0

042 B00AA00 0
042 C00AA00 0
042 D00AA00 0
042 E00AA00 0
042 F00AA00 0
042 G00AA00 0
042 H00AA00 0
043 00AA00 0
044 00AA00 0
045 00AA00 N
048 00AA00 0.000
048 A01AA00 0
048 A02AA00 0.000
048 B01AA00 0
048 B02AA00 0.000
048 C01AA00 0
048 C02AA00 0.000
048 D01AA00 0
048 D02AA00 0.000
048 E01AA00 0
048 E02AA00 0.000
048 F01AA00 0
048 F02AA00 0.000
048 G01AA00 0
048 G02AA00 0.000
048 H01AA00 0
048 H02AA00 0.000
048 I01AA00 0
048 I02AA00 0.000
048 J01AA00 0
048 J02AA00 0.000
048 K01AA00 0
048 K02AA00 0.000
058 A00AA00 N
059 00AA00 Y
060 A00AA00 Y
060 B00AA00 Y
061 00AA00 50000
066 A00AA00 N
067 00AA00 N
068 A00AA00 N
068 B00AA00 N
069 00AA00 N
077 A000000 N
078 000000 N
080 A00AA00 ICI MUTUAL INSURANCE COMPANY
080 C00AA00 400000
081 A00AA00 Y
081 B00AA00 190
082 A00AA00 N
082 B00AA00 0

083 A00AA00 N
083 B00AA00 0
084 A00AA00 N
084 B00AA00 0
085 A00AA00 Y
085 B00AA00 N
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
015 A000101 BANK OF NEW YORK
015 B000101 C
015 C010101 NEW YORK
015 C020101 NY
015 C030101 10286
015 E010101 X
028 A010100 1028293
028 A020100 70533
028 A030100 0
028 A040100 1483694
028 B010100 1197470
028 B020100 69187
028 B030100 0
028 B040100 1346124
028 C010100 1826752
028 C020100 63636
028 C030100 0
028 C040100 1189153
028 D010100 1416921
028 D020100 63322
028 D030100 0
028 D040100 1345837
028 E010100 2028401
028 E020100 60659
028 E030100 0
028 E040100 1887133
028 F010100 2640067
028 F020100 52354
028 F030100 0
028 F040100 1060010
028 G010100 10137904
028 G020100 379691
028 G030100 0

028 G040100 8311951
028 H000100 0
055 A000100 N
055 B000100 N
056 000100 Y
057 000100 N
062 A000100 Y
062 B000100 100.0
062 C000100 0.0
062 D000100 0.0
062 E000100 0.0
062 F000100 0.0
062 G000100 0.0
062 H000100 0.0
062 I000100 0.0
062 J000100 0.0
062 K000100 0.0
062 L000100 0.0
062 M000100 0.0
062 N000100 0.0
062 O000100 0.0
062 P000100 0.0
062 Q000100 0.0
062 R000100 0.0
063 A000100 76
063 B000100 0.0
064 A000100 N
064 B000100 N
070 A010100 Y
070 A020100 N
070 B010100 N
070 B020100 N
070 C010100 N
070 C020100 N
070 D010100 N
070 D020100 N
070 E010100 N
070 E020100 N
070 F010100 N
070 F020100 N
070 G010100 N
070 G020100 N
070 H010100 N
070 H020100 N
070 I010100 N
070 I020100 N
070 J010100 Y
070 J020100 N
070 K010100 Y
070 K020100 N
070 L010100 N

070 L020100 N
070 M010100 N
070 M020100 N
070 N010100 Y
070 N020100 N
070 O010100 Y
070 O020100 N
070 P010100 Y
070 P020100 N
070 Q010100 N
070 Q020100 N
070 R010100 N
070 R020100 N
071 A000100 0
071 B000100 0
071 C000100 0
071 D000100 0
072 A000100 6
072 B000100 411427
072 C000100 0
072 D000100 0
072 E000100 0
072 F000100 891
072 G000100 4581
072 H000100 0
072 I000100 1691
072 J000100 160
072 K000100 0
072 L000100 27
072 M000100 9
072 N000100 0
072 O000100 0
072 P000100 0
072 Q000100 0
072 R000100 0
072 S000100 0
072 T000100 2705
072 U000100 0
072 V000100 0
072 W000100 0
072 X000100 10064
072 Y000100 0
072 Z000100 401363
072AA000100 318
072BB000100 121
072CC010100 0
072CC020100 0
072DD010100 401363
072DD020100 0
072EE000100 0
073 A010100 0.0200

073 A020100 0.0000
073 B000100 0.0000
073 C000100 0.0000
074 A000100 0
074 B000100 0
074 C000100 22175216
074 D000100 0
074 E000100 0
074 F000100 0
074 G000100 0
074 H000100 0
074 I000100 1779
074 J000100 0
074 K000100 0
074 L000100 167983
074 M000100 0
074 N000100 22344978
074 O000100 0
074 P000100 16990
074 Q000100 0
074 R010100 0
074 R020100 0
074 R030100 0
074 R040100 58198
074 S000100 0
074 T000100 22269790
074 U010100 22268702
074 U020100 0
074 V010100 1.00
074 V020100 0.00
074 W000100 1.0001
074 X000100 137775
074 Y000100 0
075 A000100 20202681
075 B000100 0
076 000100 0.00
SIGNATURE NANCY MCCOY
TITLE MANAGER