<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001101463</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001005284</issuerCik>
      <issuerName>UNIVERSAL DISPLAY CORP \PA\</issuerName>
      <secFileNumber>001-12031</secFileNumber>
      <issuerAddress>
        <com:street1>250 PHILLIPS BOULEVARD</com:street1>
        <com:city>EWING</com:city>
        <com:stateOrCountry>NJ</com:stateOrCountry>
        <com:zipCode>08618</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>6096710980</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>LACERTE LAWRENCE</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab Corp</name>
        <address>
          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>15000</noOfUnitsSold>
      <aggregateMarketValue>2050992.00</aggregateMarketValue>
      <noOfUnitsOutstanding>47334131</noOfUnitsOutstanding>
      <approxSaleDate>05/09/2023</approxSaleDate>
      <securitiesExchangeName>Nasdaq</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>06/19/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Grants as part of Compensation</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>15000</amountOfSecuritiesAcquired>
      <paymentDate>06/19/2022</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Larry Lacerte</name>
        <address>
          <com:street1>C/O 250 Phillips Boulevard</com:street1>
          <com:city>Ewing</com:city>
          <com:stateOrCountry>NJ</com:stateOrCountry>
          <com:zipCode>08618</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>02/28/2023</saleDate>
      <amountOfSecuritiesSold>21098</amountOfSecuritiesSold>
      <grossProceeds>2902269.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <remarks>Client acquired shares 6/19/2002 thru 6/11/2023</remarks>
    <noticeSignature>
      <noticeDate>05/09/2023</noticeDate>
      <signature>Larry Lacerte</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
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144
0001101463
XXXXXXXX
LIVE
0001005284
UNIVERSAL DISPLAY CORP \PA\
001-12031
250 PHILLIPS BOULEVARD
EWING
NJ
08618
6096710980
LACERTE LAWRENCE
Director
Common
Charles Schwab Corp
3000 Schwab Way
Westlake
TX
76262
15000
2050992.00
47334131
05/09/2023
Nasdaq
Common
06/19/2022
Stock Grants as part of Compensation
Issuer
N
15000
06/19/2022
N/A
N
Larry Lacerte
C/O 250 Phillips Boulevard
Ewing
NJ
08618
Common
02/28/2023
21098
2902269.00
Client acquired shares 6/19/2002 thru 6/11/2023
05/09/2023
Larry Lacerte