<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0401</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0000747345</cik>
        <entityName>SMITHTOWN BANCORP INC</entityName>
        <issuerAddress>
            <street1>100 MOTOR PARKWAY</street1>
            <street2>SUITE 160</street2>
            <city>HAUPPAUGE</city>
            <stateOrCountry>NY</stateOrCountry>
            <zipCode>11788</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>631-360-9300</issuerPhoneNumber>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <jurisdictionOfInc>NEW YORK</jurisdictionOfInc>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Bradley</firstName>
                <middleName>E.</middleName>
                <lastName>Rock</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Anita</firstName>
                <middleName>M.</middleName>
                <lastName>Florek</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <middleName>J.</middleName>
                <lastName>Anrig</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>John</firstName>
                <middleName>A.</middleName>
                <lastName>Romano</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas</firstName>
                <middleName>J.</middleName>
                <lastName>Stevens</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Christopher</firstName>
                <middleName></middleName>
                <lastName>Becker</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>George</firstName>
                <middleName>H.</middleName>
                <lastName>Duncan</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Patrick</firstName>
                <middleName>A.</middleName>
                <lastName>Given</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Manny</firstName>
                <middleName></middleName>
                <lastName>Schwartz</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Barry</firstName>
                <middleName>M.</middleName>
                <lastName>Seigerman</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <middleName>W.</middleName>
                <lastName>Scherdel</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Patricia</firstName>
                <middleName>C.</middleName>
                <lastName>Delaney</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Joseph</firstName>
                <middleName></middleName>
                <lastName>Winters</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Hyukmun</firstName>
                <middleName></middleName>
                <lastName>Kwon</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>100 Motor Parkway</street1>
                <street2>Suite 160</street2>
                <city>Hauppauge</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>11788</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Commercial Banking</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Over $100,000,000</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2009-06-29</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isDebtType>true</isDebtType>
            <isOptionToAcquireType>true</isOptionToAcquireType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>1000000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Sandler O'Neill &amp; Partners, L.P.</recipientName>
                <recipientCRDNumber>23328</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>919 Third Avenue</street1>
                    <street2>6th Floor</street2>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <zipCode>10022</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>IL</state>
                    <state>MD</state>
                    <state>SC</state>
                </statesOfSolicitationList>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>5000000</totalOfferingAmount>
            <totalAmountSold>5000000</totalAmountSold>
            <totalRemaining>0</totalRemaining>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>3</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>175000</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>true</authorizedRepresentative>
            <signature>
                <issuerName>SMITHTOWN BANCORP, INC.</issuerName>
                <signatureName>/s/ Anita M. Florek</signatureName>
                <nameOfSigner>Anita M. Florek</nameOfSigner>
                <signatureTitle>Executive Vice President and Chief Financial Officer</signatureTitle>
                <signatureDate>2009-07-13</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
