L'Assomption College, Secondary school and heritage site in L'Assomption, Canada.

L'Assomption College is a secondary school with heritage designation located in a town east of Montreal, situated on a campus featuring classrooms, laboratories, and athletic facilities. The property comprises educational buildings and open spaces designed to support teaching and student activities.

Founded in 1832 by priest François Labelle and doctors Louis-Joseph-Charles Cazeneuve and Jean-Baptiste Meilleur, the college was run by a corporation controlled by the Bishop of Montreal. From 1848 its teaching staff were exclusively seminarians and priests, and for over a century it took only boys, who had to sleep on site. Girls were admitted from 1965, and the last baccalauréat ès arts was awarded to the 130th class in 1970.

The college's sports teams carry names rooted in school history: the Sphinx since 1966 and the Clamiks since 1974, both competing in regional and provincial leagues of the Réseau du Sport Étudiant Québécois. Alumni include singer Michel Latraverse and Supreme Court justice Marie Deschamps, honoured with the Laurier d'or.

The campus sits in the municipality of L'Assomption, in the Lanaudière region northeast of Montreal. The school is private and its buildings are a recognized heritage immovable, so visitors should check access conditions with the institution before planning a look at the grounds. The surrounding town centre is compact and walkable.

The sports teams are called the Sphinx, founded in 1966, and the Clamiks, founded in 1974; both compete in the regional and provincial leagues of the Réseau du Sport Étudiant Québécois. The cross-country teams have won five of the six regional banners.