Marc Lemay (born April 4, 1951) is a Canadian politician who served as the Member of Parliament (MP) for Abitibi—Témiscamingue from 2004 to 2011. He is a member of the Bloc Québécois (BQ).
Lemay was born in Amos, Quebec. A lawyer by occupation, he was first elected to the House of Commons in the 2004 federal election as the Bloc Québécois candidate in the newly-established riding of Abitibi—Témiscamingue. He defeated sitting MP Gilbert Barrette, the Liberal candidate, by nearly 12,000 votes. As a parliamentarian, Lemay was the Bloc's critic for Indian Affairs and Northern Development. He was defeated in the 2011 federal election by Christine Moore of the New Democratic Party (NDP).