<SEC-DOCUMENT>0001127602-25-004978.txt : 20250214
<SEC-HEADER>0001127602-25-004978.hdr.sgml : 20250214
<ACCEPTANCE-DATETIME>20250214192308
ACCESSION NUMBER:		0001127602-25-004978
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250213
FILED AS OF DATE:		20250214
DATE AS OF CHANGE:		20250214

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Boyle Hugh F
		CENTRAL INDEX KEY:			0001568582
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-33063
		FILM NUMBER:		25631968

	MAIL ADDRESS:	
		STREET 1:		SIERRA BANCORP
		STREET 2:		86 NORTH MAIN STREET
		CITY:			PORTERVILLE
		STATE:			CA
		ZIP:			95732

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SIERRA BANCORP
		CENTRAL INDEX KEY:			0001130144
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		ORGANIZATION NAME:           	02 Finance
		IRS NUMBER:				330937517
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		86 NORTH MAIN STREET
		CITY:			PORTERVILLE
		STATE:			CA
		ZIP:			93257
		BUSINESS PHONE:		5597824900

	MAIL ADDRESS:	
		STREET 1:		86 NORTH MAIN STREET
		CITY:			PORTERVILLE
		STATE:			CA
		ZIP:			93257
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-02-13</periodOfReport>

    <issuer>
        <issuerCik>0001130144</issuerCik>
        <issuerName>SIERRA BANCORP</issuerName>
        <issuerTradingSymbol>BSRR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001568582</rptOwnerCik>
            <rptOwnerName>Boyle Hugh F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>86 NORTH MAIN STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PORTERVILLE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>93257</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>EVP/Chief Credit Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-02-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4237</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>33658</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-02-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1412</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>35070</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents an award of time-based restricted stock pursuant to a grant under the Issuer's 2023 Equity Incentive Plan that vest ratably over three years, subject to forfeiture upon the occurrence of certain events specified in the agreement underlying such grant.</footnote>
        <footnote id="F2">Represents an award of performance-based restricted stock pursuant to a grant under the Issuer's 2023 Equity Incentive Plan, subject to forfeiture upon the occurrence of certain events specified in the agreement underlying such grant. The number of shares vesting at the end of three years will be calculated based upon the level of achievement of the performance goal specified in the agreement underlying such grant.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Hugh F Boyle</signatureName>
        <signatureDate>2025-02-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
