    <SEC-DOCUMENT>0001193125-18-109298-index.html : 20180406
    <SEC-HEADER>0001193125-18-109298.hdr.sgml : 20180406
    <ACCEPTANCE-DATETIME>20180406083056
    ACCESSION NUMBER:		0001193125-18-109298
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		7
    CONFORMED PERIOD OF REPORT:	20180517
    FILED AS OF DATE:		20180406
    DATE AS OF CHANGE:		20180406
    EFFECTIVENESS DATE:		20180406

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ALEXANDERS INC
    		CENTRAL INDEX KEY:			0000003499
    		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
    		IRS NUMBER:				510100517
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-06064
    		FILM NUMBER:		18741950

    	BUSINESS ADDRESS:
    		STREET 1:		210 ROUTE 4 EAST
    		CITY:			PARAMUS
    		STATE:			NJ
    		ZIP:			07652
    		BUSINESS PHONE:		201-587-8541

    	MAIL ADDRESS:
    		STREET 1:		210 ROUTE 4 EAST
    		CITY:			PARAMUS
    		STATE:			NJ
    		ZIP:			07652
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>d558882ddef14a.htm
    <DESCRIPTION>DEFINITIVE PROXY STATEMENT
    <TEXT>
    Document 1 - file: d558882ddef14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>g558882na1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g558882na1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g558882na2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g558882na2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g558882na3.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g558882na3.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>g558882na4.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g558882na4.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g558882pc2-1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g558882pc2-1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g558882pc2a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g558882pc2a.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>