    <SEC-DOCUMENT>0001140361-21-014283-index.html : 20210426
    <SEC-HEADER>0001140361-21-014283.hdr.sgml : 20210426
    <ACCEPTANCE-DATETIME>20210426163319
    ACCESSION NUMBER:		0001140361-21-014283
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		5
    CONFORMED PERIOD OF REPORT:	20210610
    FILED AS OF DATE:		20210426
    DATE AS OF CHANGE:		20210426

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ONE LIBERTY PROPERTIES INC
    		CENTRAL INDEX KEY:			0000712770
    		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
    		IRS NUMBER:				133147497
    		STATE OF INCORPORATION:			MD
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-09279
    		FILM NUMBER:		21854287

    	BUSINESS ADDRESS:
    		STREET 1:		60 CUTTER MILL RD
    		STREET 2:		SUITE 303
    		CITY:			GREAT NECK
    		STATE:			NY
    		ZIP:			11021-3190
    		BUSINESS PHONE:		5164663100

    	MAIL ADDRESS:
    		STREET 1:		60 CUTTER MILL ROAD
    		STREET 2:		SUITE 303
    		CITY:			GREAT NECK
    		STATE:			NY
    		ZIP:			11021-3190

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	ONE LIBERTY FIRESTONE PROPERTIES INC
    		DATE OF NAME CHANGE:	19851112
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>nc10023322x1_def14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: nc10023322x1_def14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>nc10023322x1_pc1.jpg
    <TEXT>
    Document 2 - file: nc10023322x1_pc1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>nc10023322x1_pc2.jpg
    <TEXT>
    Document 3 - file: nc10023322x1_pc2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>nc10023322x1_pc3.jpg
    <TEXT>
    Document 4 - file: nc10023322x1_pc3.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>sig_sasher1.jpg
    <TEXT>
    Document 5 - file: sig_sasher1.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>