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Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0000100885-07-000100.txt : 20070403
<SEC-HEADER>0000100885-07-000100.hdr.sgml : 20070403
<ACCEPTANCE-DATETIME>20070403192723
ACCESSION NUMBER:		0000100885-07-000100
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20070402
FILED AS OF DATE:		20070403
DATE AS OF CHANGE:		20070403

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KRULAK CHARLES C
		CENTRAL INDEX KEY:			0001234269

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06075
		FILM NUMBER:		07746434

	MAIL ADDRESS:	
		STREET 1:		600 N DAIRY ASHFORD
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77079

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNION PACIFIC CORP
		CENTRAL INDEX KEY:			0000100885
		STANDARD INDUSTRIAL CLASSIFICATION:	RAILROADS, LINE-HAUL OPERATING [4011]
		IRS NUMBER:				132626465
		STATE OF INCORPORATION:			UT
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1400 DOUGLAS STREET
		STREET 2:		STOP 0310
		CITY:			OMAHA
		STATE:			NE
		ZIP:			68179
		BUSINESS PHONE:		402 544 5214

	MAIL ADDRESS:	
		STREET 1:		1400 DOUGLAS STREET
		STREET 2:		STOP 0310
		CITY:			OMAHA
		STATE:			NE
		ZIP:			68179
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgardoc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-04-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000100885</issuerCik>
        <issuerName>UNION PACIFIC CORP</issuerName>
        <issuerTradingSymbol>UNP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001234269</rptOwnerCik>
            <rptOwnerName>KRULAK CHARLES C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1400 DOUGLAS ST.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>OMAHA</rptOwnerCity>
            <rptOwnerState>NE</rptOwnerState>
            <rptOwnerZipCode>68179</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Phantom Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-04-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>113</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>113</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>605</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Distribution ratio for Phantom Stock Units is 1:1.</footnote>
        <footnote id="F2">Phantom Stock Units are payable in cash only commencing at retirement.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: Trevor L. Kingston, Attorney-in-Fact  For: Charles C. Krulak</signatureName>
        <signatureDate>2007-04-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poakrula.txt
<DESCRIPTION>EDGAR SUPPORTING DOCUMENT
<TEXT>

SECTION 16 OF THE
SECURITIES EXCHANGE ACT OF 1934

POWER OF ATTORNEY



KNOW ALL MEN BY THESE PRESENTS THAT I, Charles C. Krulak,
a member of the Board of Directors of Union Pacific
Corporation,a Utah corporation (the "Company"),
do hereby appoint Thomas E. Whitaker, Michael M. Hemenway,
Trevor L. Kingston and Kari A. Peacock, and each of them
acting individually, as my true and lawful attorney-in-fact
and agent, each with power to act without the other, with full
power of substitution, to execute, deliver and file, for and
on my behalf, and in my name and in my capacity as a director
of Union Pacific Corporation, any and all Forms 4 or Forms 5
under Section 16 of the Securities Exchange Act of 1934 and
the rules and interpretations promulgated thereunder,
and any other documents in support thereof or supplemental or
amendatory thereto, with respect to the ownership by
or attributable to me, directly or indirectly, of equity
securities of the Company, or derivative securities
relating thereto, hereby granting to such attorneys and
agents and each of them full power and authority to do and
perform each and every act and thing whatsoever as
such attorney or attorneys and agents may deem necessary or
advisable to carry out fully the intent of the foregoing
as I might or could do personally or in my capacity as a
director, hereby ratifying and confirming all acts and
things which such attorney or attorneys and agents may do
or cause to be done by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of
Attorney as of February 28, 2007.


/s/ Charles C. Krulak
__________________________________
Charles C. Krulak

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
