<SEC-DOCUMENT>0001209191-23-045053.txt : 20230808
<SEC-HEADER>0001209191-23-045053.hdr.sgml : 20230808
<ACCEPTANCE-DATETIME>20230808171510
ACCESSION NUMBER:		0001209191-23-045053
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230804
FILED AS OF DATE:		20230808
DATE AS OF CHANGE:		20230808

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Gadd Michael S
		CENTRAL INDEX KEY:			0001450653

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34146
		FILM NUMBER:		231152525

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		509-835-1500

	MAIL ADDRESS:	
		STREET 1:		601 W FIRST AVE.
		STREET 2:		SUITE 1600
		CITY:			SPOKANE
		STATE:			WA
		ZIP:			99201

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Clearwater Paper Corp
		CENTRAL INDEX KEY:			0001441236
		STANDARD INDUSTRIAL CLASSIFICATION:	PAPERBOARD MILLS [2631]
		IRS NUMBER:				203594554
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		601 WEST RIVERSIDE AVENUE
		STREET 2:		SUITE 1100
		CITY:			SPOKANE
		STATE:			WA
		ZIP:			99201
		BUSINESS PHONE:		509.344.5900

	MAIL ADDRESS:	
		STREET 1:		601 WEST RIVERSIDE AVENUE
		STREET 2:		SUITE 1100
		CITY:			SPOKANE
		STATE:			WA
		ZIP:			99201

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Potlatch Forest Products CORP
		DATE OF NAME CHANGE:	20080728
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-08-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001441236</issuerCik>
        <issuerName>Clearwater Paper Corp</issuerName>
        <issuerTradingSymbol>CLW</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001450653</rptOwnerCik>
            <rptOwnerName>Gadd Michael S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>601 W RIVERSIDE AVE.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1100</rptOwnerStreet2>
            <rptOwnerCity>SPOKANE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>99201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr. Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>1</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2023-08-04</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>6182</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>35.68</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>61843</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>401(k)</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This transaction was executed pursuant to a sale in accordance with a 10b5-1 Trading Plan for diversification purposes.</footnote>
        <footnote id="F2">This price represents the weighted average purchase price for multiple transactions reported on this line.  The price of the transactions reported on this line range between $35.34 to $36.16 per share.  Upon request by the Commission staff, the issuer or a security holder of the issuer, the reporting person will undertake to provide full information regarding the number of shares purchased at each separate price within the range.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Michael S. Gadd</signatureName>
        <signatureDate>2023-08-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
