Joseph-Arthur Denis (26 April 1881 – 1 October 1934) was a Liberal party member of the Canadian House of Commons. He was born in Saint-Norbert, Quebec in Berthier County and became a physician.The son of Arsène Denis and Georgiana Laporte, Denis attended Joliette College, then Université Laval. He practised medicine at Notre-Dame-des-Bois and Montreal.He was first elected to Parliament at the St. Denis riding in the 1921 general election then re-elected in1925, 1926 and 1930.