<SEC-DOCUMENT>0001047469-17-001391-index.html : 20170308
<SEC-HEADER>0001047469-17-001391.hdr.sgml : 20170308
<ACCEPTANCE-DATETIME>20170308170721
ACCESSION NUMBER:		0001047469-17-001391
CONFORMED SUBMISSION TYPE:	PRE 14A
PUBLIC DOCUMENT COUNT:		8
CONFORMED PERIOD OF REPORT:	20170511
FILED AS OF DATE:		20170308
DATE AS OF CHANGE:		20170308

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:		PRE 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14023
		FILM NUMBER:		17675851

	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>PRE 14A
<SEQUENCE>1
<FILENAME>a2231227zpre14a.htm
<DESCRIPTION>PRE 14A
<TEXT>
Document 1 - file: a2231227zpre14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g228054.jpg
<DESCRIPTION>G228054.JPG
<TEXT>
Document 2 - file: g228054.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g911046.jpg
<DESCRIPTION>G911046.JPG
<TEXT>
Document 3 - file: g911046.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g526500.jpg
<DESCRIPTION>G526500.JPG
<TEXT>
Document 4 - file: g526500.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g856239.jpg
<DESCRIPTION>G856239.JPG
<TEXT>
Document 5 - file: g856239.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g381585.jpg
<DESCRIPTION>G381585.JPG
<TEXT>
Document 6 - file: g381585.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g22572bgi001.gif
<DESCRIPTION>G22572BGI001.GIF
<TEXT>
Document 7 - file: g22572bgi001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g22572bgi002.gif
<DESCRIPTION>G22572BGI002.GIF
<TEXT>
Document 8 - file: g22572bgi002.gif

</DOCUMENT>
</SEC-DOCUMENT>