    <SEC-DOCUMENT>0001047469-19-001682-index.html : 20190327
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    <ACCEPTANCE-DATETIME>20190327160100
    ACCESSION NUMBER:		0001047469-19-001682
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		9
    CONFORMED PERIOD OF REPORT:	20190509
    FILED AS OF DATE:		20190327
    DATE AS OF CHANGE:		20190327
    EFFECTIVENESS DATE:		20190327

    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:		19708405

    	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>a2238162zdef14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: a2238162zdef14a.htm

    </DOCUMENT>
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    <SEQUENCE>2
    <FILENAME>g160696.jpg
    <DESCRIPTION>G160696.JPG
    <TEXT>
    Document 2 - file: g160696.jpg

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    <SEQUENCE>3
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    <DESCRIPTION>G334099.JPG
    <TEXT>
    Document 3 - file: g334099.jpg

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    <SEQUENCE>4
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    <DESCRIPTION>G911046.JPG
    <TEXT>
    Document 4 - file: g911046.jpg

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    <SEQUENCE>5
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    <DESCRIPTION>G526500.JPG
    <TEXT>
    Document 5 - file: g526500.jpg

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    <SEQUENCE>6
    <FILENAME>g657700.jpg
    <DESCRIPTION>G657700.JPG
    <TEXT>
    Document 6 - file: g657700.jpg

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    <DOCUMENT>
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    <SEQUENCE>7
    <FILENAME>g160633.jpg
    <DESCRIPTION>G160633.JPG
    <TEXT>
    Document 7 - file: g160633.jpg

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    <SEQUENCE>8
    <FILENAME>g25382bii001.gif
    <DESCRIPTION>G25382BII001.GIF
    <TEXT>
    Document 8 - file: g25382bii001.gif

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g25382bii002.gif
    <DESCRIPTION>G25382BII002.GIF
    <TEXT>
    Document 9 - file: g25382bii002.gif

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