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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 zu8Qx6mkWE5v06molmWUTQ==

<SEC-DOCUMENT>0001104659-07-082810.txt : 20071114
<SEC-HEADER>0001104659-07-082810.hdr.sgml : 20071114
<ACCEPTANCE-DATETIME>20071114102233
ACCESSION NUMBER:		0001104659-07-082810
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071114
FILED AS OF DATE:		20071114
DATE AS OF CHANGE:		20071114

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Prospect Acquisition Corp
		CENTRAL INDEX KEY:			0001408100
		STANDARD INDUSTRIAL CLASSIFICATION:	BLANK CHECKS [6770]
		IRS NUMBER:				260508760
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		695 EAST MAIN STREET
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06901
		BUSINESS PHONE:		203-363-0885

	MAIL ADDRESS:	
		STREET 1:		695 EAST MAIN STREET
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06901

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Cahill James J
		CENTRAL INDEX KEY:			0001418044

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33824
		FILM NUMBER:		071241338

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		203-938-2741

	MAIL ADDRESS:	
		STREET 1:		3 KIMBERLY DRIVE
		CITY:			REDDING
		STATE:			CT
		ZIP:			06896
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>a3.xml
<DESCRIPTION>3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2007-11-14</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001408100</issuerCik>
        <issuerName>Prospect Acquisition Corp</issuerName>
        <issuerTradingSymbol>PAX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001418044</rptOwnerCik>
            <rptOwnerName>Cahill James J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PROSPECT ACQUISITION CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>695 EAST MAIN STREET</rptOwnerStreet2>
            <rptOwnerCity>STAMFORD</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06901</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CFO &amp; Secretary</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, $0.0001 Par Value Per Share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>467188</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Of which up to 60,938 shares are subject to repurchase by Prospect Acquisition Corp., at a purchase price of $0.0001 per share, in the event and to the extent that the underwriters do not exercise their over-allotment option.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ James J. Cahill</signatureName>
        <signatureDate>2007-11-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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