<SEC-DOCUMENT>0000917286-18-000062-index.html : 20180628
<SEC-HEADER>0000917286-18-000062.hdr.sgml : 20180628
<ACCEPTANCE-DATETIME>20180628102722
ACCESSION NUMBER:		0000917286-18-000062
CONFORMED SUBMISSION TYPE:	NSAR-B
PUBLIC DOCUMENT COUNT:		8
CONFORMED PERIOD OF REPORT:	20180430
FILED AS OF DATE:		20180628
DATE AS OF CHANGE:		20180628
EFFECTIVENESS DATE:		20180628

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIDELITY HEREFORD STREET TRUST
		CENTRAL INDEX KEY:			0000917286
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0430

	FILING VALUES:
		FORM TYPE:		NSAR-B
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-07139
		FILM NUMBER:		18923901

	BUSINESS ADDRESS:	
		STREET 1:		245 SUMMER STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210
		BUSINESS PHONE:		617-563-7000

	MAIL ADDRESS:	
		STREET 1:		245 SUMMER STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000917286
<SERIES-ID>S000007051
<SERIES-NAME>Fidelity Government Money Market Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000019230
<CLASS-CONTRACT-NAME>Fidelity Government Money Market Fund
<CLASS-CONTRACT-TICKER-SYMBOL>SPAXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000154303
<CLASS-CONTRACT-NAME>Capital Reserves Class
<CLASS-CONTRACT-TICKER-SYMBOL>FZAXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000154304
<CLASS-CONTRACT-NAME>Daily Money Class
<CLASS-CONTRACT-TICKER-SYMBOL>FZBXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000154305
<CLASS-CONTRACT-NAME>Premium Class
<CLASS-CONTRACT-TICKER-SYMBOL>FZCXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000190683
<CLASS-CONTRACT-NAME>Advisor M Class
<CLASS-CONTRACT-TICKER-SYMBOL>FZGXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000198393
<CLASS-CONTRACT-NAME>Class K6
<CLASS-CONTRACT-TICKER-SYMBOL>FNBXX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000917286
<SERIES-ID>S000007052
<SERIES-NAME>Fidelity Money Market Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000019231
<CLASS-CONTRACT-NAME>Fidelity Money Market Fund
<CLASS-CONTRACT-TICKER-SYMBOL>SPRXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000154306
<CLASS-CONTRACT-NAME>Premium Class
<CLASS-CONTRACT-TICKER-SYMBOL>FZDXX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000917286
<SERIES-ID>S000007053
<SERIES-NAME>Fidelity Treasury Only Money Market Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000019232
<CLASS-CONTRACT-NAME>Fidelity Treasury Only Money Market Fund
<CLASS-CONTRACT-TICKER-SYMBOL>FDLXX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000917286
<SERIES-ID>S000056367
<SERIES-NAME>Fidelity Flex Government Money Market Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000177594
<CLASS-CONTRACT-NAME>Fidelity Flex Government Money Market Fund
<CLASS-CONTRACT-TICKER-SYMBOL>FLGXX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000917286
<SERIES-ID>S000062807
<SERIES-NAME>Fidelity Series Treasury Bill Index Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000203454
<CLASS-CONTRACT-NAME>Fidelity Series Treasury Bill Index Fund
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>NSAR-B
<SEQUENCE>1
<FILENAME>answer07139.fil
<DESCRIPTION>ANSWER FILE
<TEXT>
Document 1 - file: answer07139.fil

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>2
<FILENAME>q77b_07139pws1of4.htm
<DESCRIPTION>ACCOUNTANT'S REPORT
<TEXT>
Document 2 - file: q77b_07139pws1of4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>3
<FILENAME>q77b_07139pws2of4.htm
<DESCRIPTION>ACCOUNTANT'S REPORT
<TEXT>
Document 3 - file: q77b_07139pws2of4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>4
<FILENAME>q77b_07139pws3of4.htm
<DESCRIPTION>ACCOUNTANT'S REPORT
<TEXT>
Document 4 - file: q77b_07139pws3of4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>5
<FILENAME>q77b_07139pws4of4.htm
<DESCRIPTION>ACCOUNTANT'S REPORT
<TEXT>
Document 5 - file: q77b_07139pws4of4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77Q1 OTHR EXHB
<SEQUENCE>6
<FILENAME>q77i_neworamendedsecurities.htm
<DESCRIPTION>NEW OR AMENDED SECURITIES
<TEXT>
Document 6 - file: q77i_neworamendedsecurities.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77Q1 OTHR EXHB
<SEQUENCE>7
<FILENAME>q77q1_forsubcustodbnymellon.htm
<DESCRIPTION>CUSTODY FILE
<TEXT>
Document 7 - file: q77q1_forsubcustodbnymellon.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77Q1 OTHR EXHB
<SEQUENCE>8
<FILENAME>q77q1_forsubcustodiansjpm.htm
<DESCRIPTION>CUSTODY FILE
<TEXT>
Document 8 - file: q77q1_forsubcustodiansjpm.htm

</DOCUMENT>
</SEC-DOCUMENT>