<SEC-DOCUMENT>0001209191-20-025538.txt : 20200424
<SEC-HEADER>0001209191-20-025538.hdr.sgml : 20200424
<ACCEPTANCE-DATETIME>20200424124230
ACCESSION NUMBER:		0001209191-20-025538
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200423
FILED AS OF DATE:		20200424
DATE AS OF CHANGE:		20200424

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Wallace Amber B
		CENTRAL INDEX KEY:			0001545217

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35296
		FILM NUMBER:		20813832

	MAIL ADDRESS:	
		STREET 1:		20 SOUTH BROAD STREET
		STREET 2:		PO BOX 555
		CITY:			CANFIELD
		STATE:			OH
		ZIP:			44406

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FARMERS NATIONAL BANC CORP /OH/
		CENTRAL INDEX KEY:			0000709337
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				341371693
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		20 S BROAD STREET
		STREET 2:		P O BOX 555
		CITY:			CANFIELD
		STATE:			OH
		ZIP:			44406
		BUSINESS PHONE:		3305333341
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-04-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000709337</issuerCik>
        <issuerName>FARMERS NATIONAL BANC CORP /OH/</issuerName>
        <issuerTradingSymbol>FMNB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001545217</rptOwnerCik>
            <rptOwnerName>Wallace Amber B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>20 SOUTH BROAD ST</rptOwnerStreet1>
            <rptOwnerStreet2>PO BOX 555</rptOwnerStreet2>
            <rptOwnerCity>CANFIELD</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>44406</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr VP/Chief Retail/Marketing</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Farmers National Banc Corp. Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-04-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3254</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28738</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Farmers National Banc Corp. Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-04-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1537</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>11.12</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>27201</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Acquisition represents the vesting of performance shares granted to the reporting person on April 21, 2017, which vested on the third anniversary of their grant date based upon the Company's return on equity.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Carl D. Culp, attorney in fact for Amber Wallace Soukenik</signatureName>
        <signatureDate>2020-04-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
