Marcel-Claude Roy (born 11 September 1936 in Laval-des-Rapides, Quebec) was a Liberal party member of the Canadian House of Commons. He was an agrologist by career.
He entered national politics at the Quebec riding of Laval in the 1968 federal election. He was re-elected at Laval (subsequently Laval West) in the 1972, 1974, 1979 and 1980 federal elections but was defeated by Guy Ricard of the Progressive Conservative party. Roy served five successive terms from the 28th to the 32nd Canadian Parliaments.