<SEC-DOCUMENT>0001104659-15-023119-index.html : 20150326
<SEC-HEADER>0001104659-15-023119.hdr.sgml : 20150326
<ACCEPTANCE-DATETIME>20150326164340
ACCESSION NUMBER:		0001104659-15-023119
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		7
FILED AS OF DATE:		20150326
DATE AS OF CHANGE:		20150326
EFFECTIVENESS DATE:		20150326

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CORPORATE OFFICE PROPERTIES TRUST
		CENTRAL INDEX KEY:			0000860546
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				232947217
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-203031
		FILM NUMBER:		15728180

	BUSINESS ADDRESS:	
		STREET 1:		6711 COLUMBIA GATEWAY DRIVE
		STREET 2:		SUITE 300
		CITY:			COLUMBIA
		STATE:			MD
		ZIP:			21046
		BUSINESS PHONE:		4432855400

	MAIL ADDRESS:	
		STREET 1:		6711 COLUMBIA GATEWAY DRIVE
		STREET 2:		SUITE 300
		CITY:			COLUMBIA
		STATE:			MD
		ZIP:			21046

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CORPORATE OFFICE PROPERTIES TRUST INC
		DATE OF NAME CHANGE:	19980105

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ROYALE INVESTMENTS INC
		DATE OF NAME CHANGE:	19930328

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ROYALE REIT INC
		DATE OF NAME CHANGE:	19600201
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-3ASR
<SEQUENCE>1
<FILENAME>a15-7686_1s3asr.htm
<DESCRIPTION>S-3ASR
<TEXT>
Document 1 - file: a15-7686_1s3asr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>a15-7686_1ex5d1.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 2 - file: a15-7686_1ex5d1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-8.1
<SEQUENCE>3
<FILENAME>a15-7686_1ex8d1.htm
<DESCRIPTION>EX-8.1
<TEXT>
Document 3 - file: a15-7686_1ex8d1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>4
<FILENAME>a15-7686_1ex23d1.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 4 - file: a15-7686_1ex23d1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>5
<FILENAME>a15-7686_1ex23d2.htm
<DESCRIPTION>EX-23.2
<TEXT>
Document 5 - file: a15-7686_1ex23d2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g76861bci001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g76861bci001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g76861kei001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g76861kei001.jpg

</DOCUMENT>
</SEC-DOCUMENT>