<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0001021882
<NAME> VANGUARD TREASURY FUNDS
<SERIES>
<NUMBER> 01
<NAME> VANGUARD TREASURY MONEY MARKET FUND
<MULTIPLIER> 1000
<CURRENCY> US
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-2000
<PERIOD-START> DEC-01-1999
<PERIOD-END> MAY-31-2000
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 4483023
<INVESTMENTS-AT-VALUE> 4483023
<RECEIVABLES> 59968
<ASSETS-OTHER> 802
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 4543793
<PAYABLE-FOR-SECURITIES> 379405
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 21316
<TOTAL-LIABILITIES> 400721
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4142863
<SHARES-COMMON-STOCK> 4142844
<SHARES-COMMON-PRIOR> 4592226
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 209
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 4143072
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 123444
<OTHER-INCOME> 0
<EXPENSES-NET> 7368
<NET-INVESTMENT-INCOME> 116076
<REALIZED-GAINS-CURRENT> (159)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 115917
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 116076
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2767955
<NUMBER-OF-SHARES-REDEEMED> 3328277
<SHARES-REINVESTED> 110939
<NET-CHANGE-IN-ASSETS> (449542)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 368
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 272
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7369
<AVERAGE-NET-ASSETS> 4460495
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.026
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> 0.026
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.33
</TABLE>
