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

    <schemaVersion>X0203</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2011-07-01</periodOfReport>

    <dateOfOriginalSubmission>2011-07-06</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000741516</issuerCik>
        <issuerName>AMERICAN NATIONAL BANKSHARES INC</issuerName>
        <issuerTradingSymbol>AMNB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001219529</rptOwnerCik>
            <rptOwnerName>LOVE JOHN H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P O BOX 968</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BURLINGTON</rptOwnerCity>
            <rptOwnerState>NC</rptOwnerState>
            <rptOwnerZipCode>27216</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9287</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option Right to buy</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>25.76</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2011-07-01</value>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2018-07-14</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1650</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option Right to buy</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>21.97</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2011-07-01</value>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2019-01-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2475</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Shares received pursuant to a Merger Agreement and at the effective date of American National Bankshares Inc.'s acquisition of MidCarolina Financial Corp. on July 1, 2011, by which each outstanding share of MidCarolina common stock was converted into the right to receive 0.33 shares of American common stock.</footnote>
        <footnote id="F2">Pursuant to the Merger Agreement, at the effective date of the acquisition on July 1, 2011, each outstanding option to purchase MidCarolina common stock was converted into an option to purchase American common stock, adjusted for the 0.33 exchange ratio, and became fully vested.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Carolyn Compton, POA</signatureName>
        <signatureDate>2011-07-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
