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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 QXt+DTLdzM6ULqp2y83rviIMbSWSDIfhJBTwipWbcN7s3VC4GiexVwN2KOsKyZ5A
 HUm6GjVErbfIBhgEHYE1ow==

<SEC-DOCUMENT>0001207335-08-000021.txt : 20080826
<SEC-HEADER>0001207335-08-000021.hdr.sgml : 20080826
<ACCEPTANCE-DATETIME>20080826110703
ACCESSION NUMBER:		0001207335-08-000021
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080825
FILED AS OF DATE:		20080826
DATE AS OF CHANGE:		20080826

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PLUMAS BANCORP
		CENTRAL INDEX KEY:			0001168455
		STANDARD INDUSTRIAL CLASSIFICATION:	SHORT-TERM BUSINESS CREDIT INSTITUTIONS [6153]
		IRS NUMBER:				752987096
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		35 S LINDEN AVENUE
		CITY:			QUINCY
		STATE:			CA
		ZIP:			95971
		BUSINESS PHONE:		5302837305

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Dembosz Monetta Rose
		CENTRAL INDEX KEY:			0001380409

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-49883
		FILM NUMBER:		081038252

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		530-283-7305

	MAIL ADDRESS:	
		STREET 1:		35 S. LINDAN AVE.
		CITY:			QUINCY
		STATE:			CA
		ZIP:			95971
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-08-25</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001168455</issuerCik>
        <issuerName>PLUMAS BANCORP</issuerName>
        <issuerTradingSymbol>PLBC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001380409</rptOwnerCik>
            <rptOwnerName>Dembosz Monetta Rose</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>35 S. LINDAN AVE.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>QUINCY</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95971</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-08-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>800</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.01</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8924</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By 401K Plan</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">4,359 Shares held directly and 4,565 shares held indirectly via 401K Plan.  401K holdings increased by 57 shares from last report on Form 4. The shares sold represent shares held directly.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Monetta Rose Dembosz</signatureName>
        <signatureDate>2008-08-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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