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<SEC-DOCUMENT>0001113465-10-000011.txt : 20100706
<SEC-HEADER>0001113465-10-000011.hdr.sgml : 20100705
<ACCEPTANCE-DATETIME>20100706193002
ACCESSION NUMBER:		0001113465-10-000011
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100701
FILED AS OF DATE:		20100706
DATE AS OF CHANGE:		20100706

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ACACIA RESEARCH CORP
		CENTRAL INDEX KEY:			0000934549
		STANDARD INDUSTRIAL CLASSIFICATION:	PATENT OWNERS & LESSORS [6794]
		IRS NUMBER:				954405754
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		500 NEWPORT CENTER DRIVE
		STREET 2:		7TH FLOOR
		CITY:			NEWPORT BEACH
		STATE:			CA
		ZIP:			92660
		BUSINESS PHONE:		9494808300

	MAIL ADDRESS:	
		STREET 1:		500 NEWPORT CENTER DRIVE
		STREET 2:		#
		CITY:			NEWPORT BEACH
		STATE:			CA
		ZIP:			92660

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HARRIS ROBERT L II
		CENTRAL INDEX KEY:			0001113465

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-26068
		FILM NUMBER:		10940698

	MAIL ADDRESS:	
		STREET 1:		C/O ACACIA RESEARCH CORP
		STREET 2:		500 NEWPORT CENTER DRIVE, 7TH FLOOR
		CITY:			NEWPORT BEACH
		STATE:			CA
		ZIP:			92660
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>30000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>304355</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The sales reported on this Form 4 were effected pursuant to a Rule 10b5(1) Plan adopted by the Reporting Person on February 26, 2010.</footnote>
        <footnote id="F2">The price reported is the average price for shares sold between $14.20 and $14.253 per share.</footnote>
        <footnote id="F3">The price reported is the average price for shares sold between $14.255 and $14.304 per share</footnote>
        <footnote id="F4">The price reported is the average price for shares sold between $14.305 and $14.36 per share.</footnote>
        <footnote id="F5">The price reported is the average price for shares sold between $15.505 and $14.555 per share</footnote>
        <footnote id="F6">The price reported is the average price for shares sold between $14.556 and $14.61 per share</footnote>
        <footnote id="F7">The price reported is the average price for shares sold between $14.204 and $14.25 per share.</footnote>
        <footnote id="F8">The price reported is the average price for shares sold between $14.2501 and $14.30 per share.</footnote>
        <footnote id="F9">The price reported is the average price for shares sold between $14.3001 and $14.36 per share.</footnote>
        <footnote id="F10">The price reported is the average price for shares sold between $15.00 and $15.05 per share.</footnote>
        <footnote id="F11">The price reported is the average price for shares sold between $15.06 and $15.09 per share.</footnote>
        <footnote id="F12">The price reported is the average price for shares sold between $15.11 and $15.14 per share.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Robert L. Harris, II</signatureName>
        <signatureDate>2010-07-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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