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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 FLcqHlqqbtPkRd/a0huC1jf6I/Eko6gmJ9mek15Sau/7GKD+elJqYdbhQuESRkYe
 Snhaus27AzFTCvCVw0c1Rg==

<SEC-DOCUMENT>0000074208-03-000028.txt : 20030722
<SEC-HEADER>0000074208-03-000028.hdr.sgml : 20030722
<ACCEPTANCE-DATETIME>20030722093512
ACCESSION NUMBER:		0000074208-03-000028
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030718
FILED AS OF DATE:		20030722

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CORCORAN THOMAS JAMES
		CENTRAL INDEX KEY:			0001243955

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10524
		FILM NUMBER:		03795494

	MAIL ADDRESS:	
		STREET 1:		1745 SHEA CENTER DRPLACE
		STREET 2:		STE 200
		CITY:			HIGHLANDS RANCH
		STATE:			CO
		ZIP:			80129

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITED DOMINION REALTY TRUST INC
		CENTRAL INDEX KEY:			0000074208
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				540857512
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		400 EAST CARY STREET
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23219-3802
		BUSINESS PHONE:		8047802691

	MAIL ADDRESS:	
		STREET 1:		400 EAST CARY STREET
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23219-3802

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OLD DOMINION REAL ESTATE INVESTMENT TRUST
		DATE OF NAME CHANGE:	19850110

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OLD DOMINION REIT ONE
		DATE OF NAME CHANGE:	19770921

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OLD DOMINION REAL ESTATE INVESTMENT TRUS
		DATE OF NAME CHANGE:	19741216
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>c0001243955d20030722f4f.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<ownershipDocument><schemaVersion>X0101</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-07-18</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000074208</issuerCik><issuerName>UNITED DOMINION REALTY TRUST INC</issuerName>        <issuerTradingSymbol>UDR</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001243955</rptOwnerCik><rptOwnerName>CORCORAN THOMAS JAMES</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>  </rptOwnerStreet1><rptOwnerStreet2>  </rptOwnerStreet2><rptOwnerCity>  </rptOwnerCity><rptOwnerState>  </rptOwnerState><rptOwnerZipCode>  </rptOwnerZipCode></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Senior Vice President</officerTitle><otherText></otherText></reportingOwnerRelationship></reportingOwner><derivativeSecurity><securityTitle><value>LLC Units</value><foo
tnoteId id="F1"/></securityTitle><conversionOrExercisePrice><value>0</value><footnoteId id="F2"/></conversionOrExercisePrice><transactionDate><value>2003-07-18</value></transactionDate><transactionCoding><transactionFormType>5</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>13000</value></transactionShares><transactionValue><value>1</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-06-01</value><footnoteId id="F2"/></exerciseDate><expirationDate><value>1988-08-08</value><footnoteId id="F3"/></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value><footnoteId id="F2"/></underlyingSecurityTitle><underlyingSecurityShares><value>19619</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>13000</val
ue></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><footnotes><footnote id="F1">The reporting person owns LLC Units issued by UDR Out-Performance I, LLC, a Virginia limited liability company (the "LLC").  The LLC's only assets are OPPSs issued by United Dominion Realty, L.P., a Virginia limited partnership (the "Limited Partnership").</footnote><footnote id="F2">Beginning on June 1, 2004, the LLC Units may be exchanged at the LLC's option for OPPSs on a 1:1 basis.  Each OPPS is exchangeable for approximately 1.5 Operating Partnership Units ("OPUs") issued by the Limited Partnership.  Beginning one year after the date of any such exchange of OPPSs for OPUs, the holder of the OPUs may require the Limited Partnership to redeem the OPUs for a cash amount equal to the cash value of the common stock of the Issuer on a 1:1 bas
is subject to the Issuer's right to purchase the OP Units for such cash value or by substituting shares of the Issuer's common stock on a 1:1 basis in lieu of cash.</footnote><footnote id="F3">There is no expiration date for these securities.  The field is required for filing acceptance and the date is used for acceptance of filing purposes only.</footnote></footnotes><ownerSignature><signatureName>THOMAS J CORCORAN</signatureName><signatureDate>2003-07-22</signatureDate></ownerSignature></ownershipDocument>

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