<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:ns2="http://www.sec.gov/edgar/common">
    <headerData>
        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001763605</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001097864</issuerCik>
            <issuerName>ON SEMICONDUCTOR CORPORATION</issuerName>
            <secFileNumber>001-39317</secFileNumber>
            <issuerAddress>
                <ns2:street1>5701 N. Pima Road</ns2:street1>
                <ns2:city>Scottsdale</ns2:city>
                <ns2:stateOrCountry>AZ</ns2:stateOrCountry>
                <ns2:zipCode>85250</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(602) 244-6600</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>SIMON KEETON</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>E*TRADE FINANCIAL CORPORATION</name>
                <address>
                    <ns2:street1>3 EDISON DRIVE</ns2:street1>
                    <ns2:city>ALPHARETTA</ns2:city>
                    <ns2:stateOrCountry>GA</ns2:stateOrCountry>
                    <ns2:zipCode>30005</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>11310</noOfUnitsSold>
            <aggregateMarketValue>1074450.00</aggregateMarketValue>
            <noOfUnitsOutstanding>431872829</noOfUnitsOutstanding>
            <approxSaleDate>06/30/2023</approxSaleDate>
            <securitiesExchangeName>NASD</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>03/07/2019</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1566</amountOfSecuritiesAcquired>
            <paymentDate>03/07/2019</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>03/05/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>3028</amountOfSecuritiesAcquired>
            <paymentDate>03/05/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>03/05/2019</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>3688</amountOfSecuritiesAcquired>
            <paymentDate>03/05/2019</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>03/05/2020</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>3028</amountOfSecuritiesAcquired>
            <paymentDate>03/05/2020</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>06/30/2023</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>02/17/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Simon Keeton</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
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144
0001763605
XXXXXXXX
LIVE
0001097864
ON SEMICONDUCTOR CORPORATION
001-39317
5701 N. Pima Road
Scottsdale
AZ
85250
(602) 244-6600
SIMON KEETON
Officer
Common
E*TRADE FINANCIAL CORPORATION
3 EDISON DRIVE
ALPHARETTA
GA
30005
11310
1074450.00
431872829
06/30/2023
NASD
COMMON
03/07/2019
Restricted Stock
ISSUER
N
1566
03/07/2019
Not Applicable
COMMON
03/05/2021
Restricted Stock
ISSUER
N
3028
03/05/2021
Not Applicable
COMMON
03/05/2019
Restricted Stock
ISSUER
N
3688
03/05/2019
Not Applicable
COMMON
03/05/2020
Restricted Stock
ISSUER
N
3028
03/05/2020
Not Applicable
Y
06/30/2023
02/17/2023
/s/ Simon Keeton