<SEC-DOCUMENT>0001047469-18-002260-index.html : 20180328
<SEC-HEADER>0001047469-18-002260.hdr.sgml : 20180328
<ACCEPTANCE-DATETIME>20180328160123
ACCESSION NUMBER:		0001047469-18-002260
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		8
CONFORMED PERIOD OF REPORT:	20180510
FILED AS OF DATE:		20180328
DATE AS OF CHANGE:		20180328
EFFECTIVENESS DATE:		20180328

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:		18718593

	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>a2235035zdef14a.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: a2235035zdef14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g29122bgi001.gif
<DESCRIPTION>G29122BGI001.GIF
<TEXT>
Document 2 - file: g29122bgi001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g29122bgi002.gif
<DESCRIPTION>G29122BGI002.GIF
<TEXT>
Document 3 - file: g29122bgi002.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g334099.jpg
<DESCRIPTION>G334099.JPG
<TEXT>
Document 4 - file: g334099.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g911046.jpg
<DESCRIPTION>G911046.JPG
<TEXT>
Document 5 - file: g911046.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g526500.jpg
<DESCRIPTION>G526500.JPG
<TEXT>
Document 6 - file: g526500.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g967935.jpg
<DESCRIPTION>G967935.JPG
<TEXT>
Document 7 - file: g967935.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g950110.jpg
<DESCRIPTION>G950110.JPG
<TEXT>
Document 8 - file: g950110.jpg

</DOCUMENT>
</SEC-DOCUMENT>