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        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001204119</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0000030305</issuerCik>
            <issuerName>DUCOMMUN INCORPORATED</issuerName>
            <secFileNumber>001-08174</secFileNumber>
            <issuerAddress>
                <ns2:street1>600 Anton Boulevard, Suite 1100</ns2:street1>
                <ns2:city>Costa Mesa</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>92626-7100</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(657) 335-3665</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>ROBERT C. DUCOMMUN TRUST</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Former Board Member</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>2500</noOfUnitsSold>
            <aggregateMarketValue>186058.35</aggregateMarketValue>
            <noOfUnitsOutstanding>14877749</noOfUnitsOutstanding>
            <approxSaleDate>06/11/2025</approxSaleDate>
            <securitiesExchangeName>NYSE</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>04/26/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>2500</amountOfSecuritiesAcquired>
            <paymentDate>04/26/2024</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT C. DUCOMMUN TRUST</name>
                <address>
                    <ns2:street1>600 Anton Boulevard, Suite 1100</ns2:street1>
                    <ns2:city>Costa Mesa</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92626-7100</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/10/2025</saleDate>
            <amountOfSecuritiesSold>330</amountOfSecuritiesSold>
            <grossProceeds>24505.31</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT C. DUCOMMUN TRUST</name>
                <address>
                    <ns2:street1>600 Anton Boulevard, Suite 1100</ns2:street1>
                    <ns2:city>Costa Mesa</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92626-7100</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/10/2025</saleDate>
            <amountOfSecuritiesSold>500</amountOfSecuritiesSold>
            <grossProceeds>37007.15</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT C. DUCOMMUN TRUST</name>
                <address>
                    <ns2:street1>600 Anton Boulevard, Suite 1100</ns2:street1>
                    <ns2:city>Costa Mesa</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92626-7100</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/10/2025</saleDate>
            <amountOfSecuritiesSold>500</amountOfSecuritiesSold>
            <grossProceeds>37000.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT C. DUCOMMUN TRUST</name>
                <address>
                    <ns2:street1>600 Anton Boulevard, Suite 1100</ns2:street1>
                    <ns2:city>Costa Mesa</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92626-7100</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/09/2025</saleDate>
            <amountOfSecuritiesSold>500</amountOfSecuritiesSold>
            <grossProceeds>36895.20</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT C. DUCOMMUN TRUST</name>
                <address>
                    <ns2:street1>600 Anton Boulevard, Suite 1100</ns2:street1>
                    <ns2:city>Costa Mesa</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92626-7100</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/09/2025</saleDate>
            <amountOfSecuritiesSold>470</amountOfSecuritiesSold>
            <grossProceeds>34811.26</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT C. DUCOMMUN TRUST</name>
                <address>
                    <ns2:street1>600 Anton Boulevard, Suite 1100</ns2:street1>
                    <ns2:city>Costa Mesa</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92626-7100</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/06/2025</saleDate>
            <amountOfSecuritiesSold>2500</amountOfSecuritiesSold>
            <grossProceeds>182736.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT C. DUCOMMUN TRUST</name>
                <address>
                    <ns2:street1>600 Anton Boulevard, Suite 1100</ns2:street1>
                    <ns2:city>Costa Mesa</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92626-7100</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/06/2025</saleDate>
            <amountOfSecuritiesSold>500</amountOfSecuritiesSold>
            <grossProceeds>36639.05</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT C. DUCOMMUN TRUST</name>
                <address>
                    <ns2:street1>600 Anton Boulevard, Suite 1100</ns2:street1>
                    <ns2:city>Costa Mesa</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92626-7100</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/06/2025</saleDate>
            <amountOfSecuritiesSold>500</amountOfSecuritiesSold>
            <grossProceeds>36665.25</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT C. DUCOMMUN TRUST</name>
                <address>
                    <ns2:street1>600 Anton Boulevard, Suite 1100</ns2:street1>
                    <ns2:city>Costa Mesa</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92626-7100</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/06/2025</saleDate>
            <amountOfSecuritiesSold>500</amountOfSecuritiesSold>
            <grossProceeds>36784.40</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>ROBERT C. DUCOMMUN TRUST</name>
                <address>
                    <ns2:street1>600 Anton Boulevard, Suite 1100</ns2:street1>
                    <ns2:city>Costa Mesa</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92626-7100</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/06/2025</saleDate>
            <amountOfSecuritiesSold>1000</amountOfSecuritiesSold>
            <grossProceeds>73570.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>06/11/2025</noticeDate>
            <planAdoptionDates/>
            <signature>/s/ Robert C. Ducommun, Trustee</signature>
        </noticeSignature>
    </formData>
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144
0001204119
XXXXXXXX
LIVE
0000030305
DUCOMMUN INCORPORATED
001-08174
600 Anton Boulevard, Suite 1100
Costa Mesa
CA
92626-7100
(657) 335-3665
ROBERT C. DUCOMMUN TRUST
Former Board Member
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
2500
186058.35
14877749
06/11/2025
NYSE
Common
04/26/2024
Restricted stock vesting under a registered plan
Issuer
N
2500
04/26/2024
Not Applicable
N
ROBERT C. DUCOMMUN TRUST
600 Anton Boulevard, Suite 1100
Costa Mesa
CA
92626-7100
Common
06/10/2025
330
24505.31
ROBERT C. DUCOMMUN TRUST
600 Anton Boulevard, Suite 1100
Costa Mesa
CA
92626-7100
Common
06/10/2025
500
37007.15
ROBERT C. DUCOMMUN TRUST
600 Anton Boulevard, Suite 1100
Costa Mesa
CA
92626-7100
Common
06/10/2025
500
37000.00
ROBERT C. DUCOMMUN TRUST
600 Anton Boulevard, Suite 1100
Costa Mesa
CA
92626-7100
Common
06/09/2025
500
36895.20
ROBERT C. DUCOMMUN TRUST
600 Anton Boulevard, Suite 1100
Costa Mesa
CA
92626-7100
Common
06/09/2025
470
34811.26
ROBERT C. DUCOMMUN TRUST
600 Anton Boulevard, Suite 1100
Costa Mesa
CA
92626-7100
Common
06/06/2025
2500
182736.00
ROBERT C. DUCOMMUN TRUST
600 Anton Boulevard, Suite 1100
Costa Mesa
CA
92626-7100
Common
06/06/2025
500
36639.05
ROBERT C. DUCOMMUN TRUST
600 Anton Boulevard, Suite 1100
Costa Mesa
CA
92626-7100
Common
06/06/2025
500
36665.25
ROBERT C. DUCOMMUN TRUST
600 Anton Boulevard, Suite 1100
Costa Mesa
CA
92626-7100
Common
06/06/2025
500
36784.40
ROBERT C. DUCOMMUN TRUST
600 Anton Boulevard, Suite 1100
Costa Mesa
CA
92626-7100
Common
06/06/2025
1000
73570.00
06/11/2025
/s/ Robert C. Ducommun, Trustee