Léon Dion OC OQ (9 October 1922 – 20 August 1997) was a Canadian political scientist. Dion was born in Saint-Arsène, Rivière-du-Loup Regional County Municipality. He founded the department of political science at Université Laval with and Maurice Tremblay in 1954. He is the father of former federal foreign affairs minister and former Liberal leader Stéphane Dion.