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{{Infobox officeholder
|name=Claude Berwick Duval, I
|office=[[Louisiana]] State Senator for<br> [[Terrebonne Parish|Terrebonne]] and St. Mary parishes
|term_start=1968
|term_end=1980
Anthony Guarisco, Jr.
|birth_date=October 24, 1914
|birth_place=Houma, [[Terrebonne Parish]]<br>[[Louisiana]], [[United States|USA]]
|death_date=March 3, 1986 (aged 71)
|resting_place=Magnolia Cemetery in Houma
|religion=[[Episcopalian]]
}}
'''Claude Berwick Duval, I''' (October 24, 1914 – March 3, 1986), was an attorney from his native Houma, [[Louisiana]], who from 1968 to 1980 was a three-term [[Democratic Party|Democratic]] state senator for [[Terrebonne Parish|Terrebonne]] and St. Mary parishes.<ref>{{cite web|url=http://www.senate.la.gov/Documents/Membership/Documents/SenateMembership1880ForwardRevisedMar2011.pdf|title=Membership in the Louisiana Senate, 1880 - Present (St. Mary and Terrebonne parishes)|publisher=Louisiana State Senate|accessdate=November 3, 2019}}</ref>
He is best known for his profound oratory, his accommodation of Senate colleagues, his unsuccessful 1963-1964 campaign for lieutenant governor, and his opposition to the national holiday on the third Monday of January which honors [[civil rights]] activist [[Martin Luther King, Jr.]]
