The Longueuil Chevaliers ("Cavaliers") were a junior ice hockey team in the Quebec Major Junior Hockey League, playing in Longueuil, Quebec, Canada at Colisée Jean Béliveau.

They were founded in 1982 and set a Canadian Hockey League record for the most successful season ever by an expansion franchise, going 37-29-4 under the coaching of Jacques Lemaire.

The Chevaliers finished runners-up both times losing to greater Montreal rival teams, the Verdun Juniors in 1983, and the Laval Voisins in 1984.

The team started the season with Guy Lapointe as general manager, who was promoted to assistant coach with the Quebec Nordiques mid-season.

The Chevaliers survived the round-robin to start the post-season, then faced the Laval Titan in the division finals.