<SEC-DOCUMENT>0001209191-16-114128.txt : 20160413
<SEC-HEADER>0001209191-16-114128.hdr.sgml : 20160413
<ACCEPTANCE-DATETIME>20160413170523
ACCESSION NUMBER:		0001209191-16-114128
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20160411
FILED AS OF DATE:		20160413
DATE AS OF CHANGE:		20160413

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FARMER BROTHERS CO
		CENTRAL INDEX KEY:			0000034563
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS FOOD PREPARATIONS & KINDRED PRODUCTS [2090]
		IRS NUMBER:				950725980
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		13601 NORTH FREEWAY, SUITE 200
		CITY:			FORT WORTH
		STATE:			TX
		ZIP:			76177
		BUSINESS PHONE:		682 549 6600

	MAIL ADDRESS:	
		STREET 1:		P O BOX 77057
		CITY:			FORT WORTH
		STATE:			TX
		ZIP:			76177

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Farmer Richard F
		CENTRAL INDEX KEY:			0001314759

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34249
		FILM NUMBER:		161569801

	MAIL ADDRESS:	
		STREET 1:		FARMER BROS CO
		STREET 2:		20333 S NORMANDIE AV
		CITY:			TORRANCE
		STATE:			CA
		ZIP:			90502
</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>2016-04-11</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000034563</issuerCik>
        <issuerName>FARMER BROTHERS CO</issuerName>
        <issuerTradingSymbol>FARM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001314759</rptOwnerCik>
            <rptOwnerName>Farmer Richard F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FARMER BROS. CO.</rptOwnerStreet1>
            <rptOwnerStreet2>13601 NORTH FREEWAY, SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>FORT WORTH</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>76177</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $1.00 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2016-04-11</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>31.95</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3309674</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Trustee</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Reflects the Reporting Person's beneficial ownership of shares of Common Stock as a member of the Farmer Group (as defined in Schedule 13D/A filed with the SEC on September 21, 2006), as reported in the Company's Definitive Proxy Statement on Schedule 14A filed with the SEC on October 28, 2015, after giving effect to the reported transaction and the sale transactions reported by the Reporting Person in his Form 4s relating to the Common Stock filed with the SEC on December 10, 2015, December 17, 2015 and December 28, 2015.</footnote>
        <footnote id="F2">The shares of Common Stock were sold directly by a trust of which the Reporting Person is the sole settlor, trustee and beneficiary. This sale was made pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Richard F. Farmer</signatureName>
        <signatureDate>2015-04-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
