<SEC-DOCUMENT>0000356173-18-000092-index.html : 20180607
<SEC-HEADER>0000356173-18-000092.hdr.sgml : 20180607
<ACCEPTANCE-DATETIME>20180607101958
ACCESSION NUMBER:		0000356173-18-000092
CONFORMED SUBMISSION TYPE:	N-MFP2
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180531
FILED AS OF DATE:		20180607
DATE AS OF CHANGE:		20180607

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:		N-MFP2
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-03320
		FILM NUMBER:		18885511

	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>S000004821
<SERIES-NAME>Prime Money Market Portfolio
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000013040
<CLASS-CONTRACT-NAME>Class I
<CLASS-CONTRACT-TICKER-SYMBOL>FIDXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000013083
<CLASS-CONTRACT-NAME>Class II
<CLASS-CONTRACT-TICKER-SYMBOL>FDOXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000013084
<CLASS-CONTRACT-NAME>Class III
<CLASS-CONTRACT-TICKER-SYMBOL>FCDXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000013085
<CLASS-CONTRACT-NAME>Select Class
<CLASS-CONTRACT-TICKER-SYMBOL>FDIXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000056569
<CLASS-CONTRACT-NAME>Class IV
<CLASS-CONTRACT-TICKER-SYMBOL>FDVXX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000056570
<CLASS-CONTRACT-NAME>Institutional Class
<CLASS-CONTRACT-TICKER-SYMBOL>FIPXX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-MFP2
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
</SEC-DOCUMENT>