-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Rnk9zTx4GbRizOg2rGQOkz77IsbGLzYAsVpjZF36UyFSx3sVy5gXPK6Yi2DDk3Tw
 kqQO1cOBIdOY60C/FgGglg==

<SEC-DOCUMENT>0001225401-03-000003.txt : 20031126
<SEC-HEADER>0001225401-03-000003.hdr.sgml : 20031126
<ACCEPTANCE-DATETIME>20031126114016
ACCESSION NUMBER:		0001225401-03-000003
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031120
FILED AS OF DATE:		20031126

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FNB BANCORP/CA/
		CENTRAL INDEX KEY:			0001163199
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				922115369

	BUSINESS ADDRESS:	
		STREET 1:		975 EL CAMINO REAL 3RD FL
		STREET 2:		C/O FIRST NATIONAL BANK
		CITY:			S. SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
		BUSINESS PHONE:		6505886800

	MAIL ADDRESS:	
		STREET 1:		975 EL CAMINO REAL 3RD FL
		STREET 2:		C/O FIRST NATIONAL BANK
		CITY:			S. SAN FRANCISCO
		STATE:			CA
		ZIP:			94080

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RAMSEY JAMES B
		CENTRAL INDEX KEY:			0001225401

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-49693
		FILM NUMBER:		031025233

	BUSINESS ADDRESS:	
		STREET 1:		C/O FNB BANCORP
		STREET 2:		975 EL CAMINO REAL
		CITY:			S. SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
		BUSINESS PHONE:		6505886800

	MAIL ADDRESS:	
		STREET 1:		C/O FNB BANCORP
		STREET 2:		975 EL CAMINO REAL
		CITY:			S. SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2003-11-20</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001163199</issuerCik>
        <issuerName>FNB BANCORP/CA/</issuerName>
        <issuerTradingSymbol>fnbg.ob</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001225401</rptOwnerCik>
            <rptOwnerName>RAMSEY JAMES B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FNB BANCORP</rptOwnerStreet1>
            <rptOwnerStreet2>975 EL CAMINO REAL</rptOwnerStreet2>
            <rptOwnerCity>S. SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94080</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CFO/SVP</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>

        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2003-11-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>39</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>29.7</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>700</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>James B. Ramsey Roth IRA</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

    </nonDerivativeTable>



    <ownerSignature>
        <signatureName>James B. Ramsey</signatureName>
        <signatureDate>2003-11-26</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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