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<PAGE> PAGE 2
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<PAGE> PAGE 3
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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 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 16
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SIGNATURE JOHN H. COSTELLO
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
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<CIK> 0000917286
<NAME> Fidelity Hereford Street Trust
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<NAME> Spartan U.S. Treasury Money Market Fund
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<S>
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0
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0
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0
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1,848,870
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1,794,898
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0
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0
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0
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0
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1,848,797
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0
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48,279
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0
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4,118
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44,161
<REALIZED-GAINS-CURRENT>
62
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0
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44,223
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0
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44,161
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0
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0
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905,640
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42,686
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54,034
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0
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0
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4,152
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1.000
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0
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.024
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0
<RETURNS-OF-CAPITAL>
0
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1.000
<EXPENSE-RATIO>
45
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000917286
<NAME> Fidelity Hereford Street Trust
<SERIES>
<NUMBER> 11
<NAME> Spartan Money Market Fund
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<S>
<C>
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6-Mos
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apr-30-1997
<PERIOD-END>
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9,259,200
<INVESTMENTS-AT-VALUE>
9,259,200
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45,392
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0
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
9,304,592
<PAYABLE-FOR-SECURITIES>
348,389
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
22,442
<TOTAL-LIABILITIES>
370,831
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
8,936,515
<SHARES-COMMON-STOCK>
8,936,004
<SHARES-COMMON-PRIOR>
8,452,865
<ACCUMULATED-NII-CURRENT>
0
<OVERDISTRIBUTION-NII>
0
<ACCUMULATED-NET-GAINS>
(2,754)
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
0
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8,933,761
<DIVIDEND-INCOME>
0
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238,004
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0
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19,379
<NET-INVESTMENT-INCOME>
218,625
<REALIZED-GAINS-CURRENT>
77
<APPREC-INCREASE-CURRENT>
0
<NET-CHANGE-FROM-OPS>
218,702
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
218,625
<DISTRIBUTIONS-OF-GAINS>
0
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
5,920,497
<NUMBER-OF-SHARES-REDEEMED>
5,650,944
<SHARES-REINVESTED>
213,586
<NET-CHANGE-IN-ASSETS>
483,216
<ACCUMULATED-NII-PRIOR>
0
<ACCUMULATED-GAINS-PRIOR>
(2,831)
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
19,448
<INTEREST-EXPENSE>
0
<GROSS-EXPENSE>
19,468
<AVERAGE-NET-ASSETS>
8,582,223
<PER-SHARE-NAV-BEGIN>
1.000
<PER-SHARE-NII>
.026
<PER-SHARE-GAIN-APPREC>
0
<PER-SHARE-DIVIDEND>
.026
<PER-SHARE-DISTRIBUTIONS>
0
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
1.000
<EXPENSE-RATIO>
45
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000917286
<NAME> Fidelity Hereford Street Trust
<SERIES>
<NUMBER> 21
<NAME> Spartan U.S. Government Money Market Fund
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
6-Mos
<FISCAL-YEAR-END>
apr-30-1997
<PERIOD-END>
oct-31-1996
<INVESTMENTS-AT-COST>
892,270
<INVESTMENTS-AT-VALUE>
892,270
<RECEIVABLES>
3,510
<ASSETS-OTHER>
0
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
895,780
<PAYABLE-FOR-SECURITIES>
20,982
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
2,545
<TOTAL-LIABILITIES>
23,527
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
872,422
<SHARES-COMMON-STOCK>
872,422
<SHARES-COMMON-PRIOR>
761,647
<ACCUMULATED-NII-CURRENT>
0
<OVERDISTRIBUTION-NII>
0
<ACCUMULATED-NET-GAINS>
(169)
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
0
<NET-ASSETS>
872,253
<DIVIDEND-INCOME>
0
<INTEREST-INCOME>
22,774
<OTHER-INCOME>
0
<EXPENSES-NET>
1,869
<NET-INVESTMENT-INCOME>
20,905
<REALIZED-GAINS-CURRENT>
3
<APPREC-INCREASE-CURRENT>
0
<NET-CHANGE-FROM-OPS>
20,908
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
20,905
<DISTRIBUTIONS-OF-GAINS>
0
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
488,882
<NUMBER-OF-SHARES-REDEEMED>
398,303
<SHARES-REINVESTED>
20,196
<NET-CHANGE-IN-ASSETS>
110,778
<ACCUMULATED-NII-PRIOR>
0
<ACCUMULATED-GAINS-PRIOR>
(171)
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
1,878
<INTEREST-EXPENSE>
0
<GROSS-EXPENSE>
1,879
<AVERAGE-NET-ASSETS>
828,520
<PER-SHARE-NAV-BEGIN>
1.000
<PER-SHARE-NII>
.025
<PER-SHARE-GAIN-APPREC>
0
<PER-SHARE-DIVIDEND>
.025
<PER-SHARE-DISTRIBUTIONS>
0
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
1.000
<EXPENSE-RATIO>
45
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
