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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 ITMuAnvYkvU/TIfRCZLCgF+cV/uyrltVw6EVI3tKoU6MzUcxuVmpJ64yCwTQhxz5
 zyEGS9CL4SewXeQAXrhRAA==

<SEC-DOCUMENT>9999999997-05-018005.txt : 20050412
<SEC-HEADER>9999999997-05-018005.hdr.sgml : 20050412
<ACCEPTANCE-DATETIME>20050412104302
<PAPER>
ACCESSION NUMBER:		9999999997-05-018005
CONFORMED SUBMISSION TYPE:	ARS
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20041231
FILED AS OF DATE:		20050411
DATE AS OF CHANGE:		20050412
EFFECTIVENESS DATE:		20050411

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:		ARS
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14023
		FILM NUMBER:		05050043

	BUSINESS ADDRESS:	
		STREET 1:		8815 CENTRE PARK DR
		STREET 2:		SUITE 400
		CITY:			COLUMBIA
		STATE:			MD
		ZIP:			21045
		BUSINESS PHONE:		6105381800

	MAIL ADDRESS:	
		STREET 1:		8815 CENTRE PARK DR
		STREET 2:		SUITE 400
		CITY:			COLUMBIA
		STATE:			MD
		ZIP:			21045

	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>ARS
<SEQUENCE>1
<FILENAME>9999999997-05-018005.paper
<DESCRIPTION>AUTO-GENERATED PAPER DOCUMENT
<TEXT>
This document was generated as part of a paper submission.
Please reference the Document Control Number 05050043 for access to the original document.
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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