Wikipedia
Blainville—Deux-Montagnes (formerly known as Deux-Montagnes) was a federal electoral district in Quebec, Canada, that was represented in the House of Commons from 1979 to 1997.
The riding was created as "Deux-Montagnes" in 1976 from parts of Argenteuil—Deux-Montagnes and Terrebonne ridings. It was renamed "Blainville—Deux-Montagnes" in 1977. The electoral district was abolished in 1996, and divided between Saint-Eustache—Sainte-Thérèse and Terrebonne—Blainville ridings.
Blainville—Deux-Montagnes initially consisted of the cities of Deux-Montagnes and Sainte-Thérèse; the towns of Blainville, Boisbriand, Lorraine, Rosemère, Saint Eustache and Sainte-Marthe-surle-Lac; and the village municipality of Pointe-Calumet and the parish municipality of Saint-Joseph-du-Lac in the county of Deux-Montagnes. In 1987, it was redefined to consist of the towns of Blainville, Boisbriand, Deux-Montagnes, Lorraine, Rosemère, Saint-Eustache, Sainte-Marthe-sur-le-Lac and Sainte-Thérèse.