<SEC-DOCUMENT>0001047469-15-002800-index.html : 20150326
<SEC-HEADER>0001047469-15-002800.hdr.sgml : 20150326
<ACCEPTANCE-DATETIME>20150326162601
ACCESSION NUMBER:		0001047469-15-002800
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		6
CONFORMED PERIOD OF REPORT:	20150507
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:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14023
		FILM NUMBER:		15727967

	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>DEF 14A
<SEQUENCE>1
<FILENAME>a2223810zdef14a.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: a2223810zdef14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g285972.jpg
<DESCRIPTION>G285972.JPG
<TEXT>
Document 2 - file: g285972.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g159773.jpg
<DESCRIPTION>G159773.JPG
<TEXT>
Document 3 - file: g159773.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g446192.jpg
<DESCRIPTION>G446192.JPG
<TEXT>
Document 4 - file: g446192.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g15992bgi001.gif
<DESCRIPTION>G15992BGI001.GIF
<TEXT>
Document 5 - file: g15992bgi001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g15992bgi002.gif
<DESCRIPTION>G15992BGI002.GIF
<TEXT>
Document 6 - file: g15992bgi002.gif

</DOCUMENT>
</SEC-DOCUMENT>