Serge Cardin (born July 2, 1950 in Sherbrooke, Quebec) is a Canadian politician. He was a Parti Québécois member of the National Assembly of Quebec for the Sherbrooke electoral district from 2012 to 2014, and was formerly a Bloc Québécois Member of Parliament for the federal riding of Sherbrooke from 1998 to 2011.In the 2011 Quebec federal election, lost his seat to Pierre-Luc Dusseault, then a 19-year-old university student and the youngest MP ever elected in Canadian history.