<SEC-DOCUMENT>0000826154-18-000032.txt : 20180124
<SEC-HEADER>0000826154-18-000032.hdr.sgml : 20180124
<ACCEPTANCE-DATETIME>20180124163457
ACCESSION NUMBER:		0000826154-18-000032
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180123
FILED AS OF DATE:		20180124
DATE AS OF CHANGE:		20180124

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BOYLE DAVID P
		CENTRAL INDEX KEY:			0001202722

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34292
		FILM NUMBER:		18545541

	MAIL ADDRESS:	
		STREET 1:		5151 COLUMBUS RD
		CITY:			WOOSTER
		STATE:			OH
		ZIP:			44691

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ORRSTOWN FINANCIAL SERVICES INC
		CENTRAL INDEX KEY:			0000826154
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				232530374
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		77 E KING STREET
		STREET 2:		P O BOX 250
		CITY:			SHIPPENSBURG
		STATE:			PA
		ZIP:			17257
		BUSINESS PHONE:		7175326114

	MAIL ADDRESS:	
		STREET 1:		77 EAST KING STREET
		CITY:			SHIPPENSBURG
		STATE:			PA
		ZIP:			17257
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_151682968427661.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-01-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000826154</issuerCik>
        <issuerName>ORRSTOWN FINANCIAL SERVICES INC</issuerName>
        <issuerTradingSymbol>ORRF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001202722</rptOwnerCik>
            <rptOwnerName>BOYLE DAVID P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>77 EAST KING STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SHIPPENSBURG</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>17257</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Financial Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Orrstown Financial Services, Inc. Common, Restricted Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-01-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2180</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>26.05</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>43579.68</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Casara I. Kieffer</signatureName>
        <signatureDate>2018-01-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
