<SEC-DOCUMENT>0001379491-18-002762-index.html : 20180529
<SEC-HEADER>0001379491-18-002762.hdr.sgml : 20180529
<ACCEPTANCE-DATETIME>20180529110935
ACCESSION NUMBER:		0001379491-18-002762
CONFORMED SUBMISSION TYPE:	497K
PUBLIC DOCUMENT COUNT:		7
FILED AS OF DATE:		20180529
DATE AS OF CHANGE:		20180529
EFFECTIVENESS DATE:		20180529

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Fidelity Colchester Street Trust
		CENTRAL INDEX KEY:			0000356173
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		497K
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	002-74808
		FILM NUMBER:		18863366

	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

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COLCHESTER STREET TRUST
		DATE OF NAME CHANGE:	19980324

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIDELITY INSTITUTIONAL CASH PORTFOLIOS
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CASH INVESTMENT FUND
		DATE OF NAME CHANGE:	19850414
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000356173
<SERIES-ID>S000004820
<SERIES-NAME>Government Portfolio
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000013039
<CLASS-CONTRACT-NAME>Class I
<CLASS-CONTRACT-TICKER-SYMBOL>FIGXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000013080
<CLASS-CONTRACT-NAME>Class II
<CLASS-CONTRACT-TICKER-SYMBOL>FCVXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000013081
<CLASS-CONTRACT-NAME>Class III
<CLASS-CONTRACT-TICKER-SYMBOL>FCGXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000013082
<CLASS-CONTRACT-NAME>Select Class
<CLASS-CONTRACT-TICKER-SYMBOL>FGEXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000141704
<CLASS-CONTRACT-NAME>Institutional Class
<CLASS-CONTRACT-TICKER-SYMBOL>FRGXX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497K
<SEQUENCE>1
<FILENAME>filing380817026.htm
<TEXT>
Document 1 - file: filing380817026.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>fipro_logo.jpg
<TEXT>
Document 2 - file: fipro_logo.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>img380306965.jpg
<TEXT>
Document 3 - file: img380306965.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>img379015258.jpg
<TEXT>
Document 4 - file: img379015258.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>img380132745.jpg
<TEXT>
Document 5 - file: img380132745.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>img380060324.jpg
<TEXT>
Document 6 - file: img380060324.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>img380361339.jpg
<TEXT>
Document 7 - file: img380361339.jpg

</DOCUMENT>
</SEC-DOCUMENT>