Marcel R. Tremblay (born 30 March 1943 in L'Ange-Gardien, Quebec) was a Progressive Conservative member of the Canadian House of Commons. He was an accountant and business consultant by career.
He represented the Quebec riding of Quebec East where he was first elected in the 1984 federal election and re-elected in 1988, therefore becoming a member in the 33rd and 34th Canadian Parliaments.
Tremblay left federal politics after he was defeated in the 1993 federal election by Jean-Paul Marchand of the Bloc Québécois.