Jacques Dumoulin (February 12, 1898 – February 20, 1988) was a Canadian provincial politician and judge.
Born in Quebec City, Quebec, the son of Philippe-Benjamin Dumoulin and Marie-Louise Taschereau, Dumoulin was the member of the Legislative Assembly of Quebec for Montmorency from 1939 to 1948.
He was later a judge of the Exchequer Court of Canada from 1955 to 1971 and of the Appeal Division of the Federal Court of Canada from 1971 until 1972.