Sainte-Marthe-sur-le-Lac is an off-island suburb of Montreal, in the Canadian province of Quebec, in the Deux-Montagnes Regional County Municipality, 40 km from Montreal. It is crossed from east to west by Route 344, commonly known as Oka Road. The town shares its borders with Deux-Montagnes to the east, Saint-Joseph-du-Lac to the west, the Lake of Two Mountains to the south, and Saint-Eustache to the north. It shares police, firefighters, waterworks, and other services with the city of Deux-Montagnes. It was formerly known as a rural town in which most of its inhabitants were seasonal vacationers, but it is increasingly lived in year-round.

History

On 27 April 2019, there was a flooding that forced more than 6000 people to be evacuated.

Demographics

In the 2021 Census of Population conducted by Statistics Canada, Sainte-Marthe-sur-le-Lac had a population of 19,797 living in 7,503 of its 7,642 total private dwellings, a change of NaN% from its 2016 population of 18,074. With a land area of 8.73 km2, it had a population density of in 2021. Population trend: Mother tongue:

Education

The Commission scolaire de la Seigneurie-des-Mille-Îles (CSSMI) operates Francophone schools. This community has three elementary schools (Horizon-du-Lac, Des-Lucioles, and des Grands-Vents ) and one alternative lower secondary school (École secondaire Liberté-Jeunesse). École Polyvalente Deux-Montagnes has upper secondary education. Some areas are served by École des Mésanges and Emmanuel-Chénard, both also in Deux-Montagnes, and Polyvalente Deux-Montagnes (for all secondary levels). Anglophone schools are operated by the Sir Wilfrid Laurier School Board, and the community is served by Lake of Two Mountains High School, in Deux-Montagnes. Mountainview Elementary School and Saint Jude Elementary School, both in Deux-Montagnes, also serve this community.