-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 NnL+4H4VGkICAEnLO3l6cpjtysGueSoV2p5Xy/MQbEN5xVCNizFjYzVIjUIDGW+q
 XGg+5AlrwsOomTm/GA75ZQ==

<SEC-DOCUMENT>0000910647-05-000192.txt : 20050623
<SEC-HEADER>0000910647-05-000192.hdr.sgml : 20050623
<ACCEPTANCE-DATETIME>20050623164212
ACCESSION NUMBER:		0000910647-05-000192
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050623
FILED AS OF DATE:		20050623
DATE AS OF CHANGE:		20050623

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MONGEON MARSHA A
		CENTRAL INDEX KEY:			0001222972

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15985
		FILM NUMBER:		05912858

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		8027559281

	MAIL ADDRESS:	
		STREET 1:		P O BOX 251
		CITY:			ALBANY
		STATE:			VT
		ZIP:			05820

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNION BANKSHARES INC
		CENTRAL INDEX KEY:			0000706863
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				030283552
		STATE OF INCORPORATION:			VT
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		20 MAIN STREET
		STREET 2:		P O BOX 667
		CITY:			MORRISVILLE
		STATE:			VT
		ZIP:			05661-0667
		BUSINESS PHONE:		8028886600

	MAIL ADDRESS:	
		STREET 1:		20 MAIN STREET
		STREET 2:		P O BOX 667
		CITY:			MORRISVILLE
		STATE:			VT
		ZIP:			05661-0667
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-06-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000706863</issuerCik>
        <issuerName>UNION BANKSHARES INC</issuerName>
        <issuerTradingSymbol>UNB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001222972</rptOwnerCik>
            <rptOwnerName>MONGEON MARSHA A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P O BOX 251</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ALBANY</rptOwnerCity>
            <rptOwnerState>VT</rptOwnerState>
            <rptOwnerZipCode>05820</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Vice President &amp; Treasurer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-06-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>35</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>21.6</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>833</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option Right to Buy Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>26.6</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2005-01-02</value>
            </exerciseDate>
            <expirationDate>
                <value>2009-01-01</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>250</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>250</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option Right to Buy Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>25.3</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2004-12-17</value>
            </exerciseDate>
            <expirationDate>
                <value>2008-12-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>250</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>250</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <ownerSignature>
        <signatureName>/s/ Marsha A. Mongeon</signatureName>
        <signatureDate>2005-06-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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