Alexandre Dumas (c. 1726 – July 11, 1802) was a lawyer, notary, businessman and political figure in Lower Canada.
He renounced his faith in 1760 to marry a Roman Catholic, Josephte Laroche, widow of Jean Requiem, a ship's captain.
In 1778, Dumas became sole lessee of the ironworks, holding it until 1783, when the lease was taken over by Conrad Gugy.
He was elected to the Legislative Assembly of Lower Canada for Dorchester County in 1796.
In 1802, he married Catherine, the daughter of Jean-Thomas Lée, a merchant whose son Thomas later also served as a member of the legislative assembly.