Sainte-Anne-des-Plaines () is a city in southwestern Quebec, Canada, northwest of the city of Montreal in the Thérèse-De Blainville Regional County Municipality, in the region of Laurentides. Its population was 14,990 during the census of 2014.
The city has the Sainte-Anne-des-Plaines Complex of the Correctional Service of Canada, which includes the Regional Reception Centre (multi-level security), housing Special Handling Unit (SHU), Canada's highest-security unit; Sainte-Anne-des-Plaines Institution (maximum security), and the Regional Mental Health Centre (multi). It also has the Archambault Institution. Sainte-Anne-Des-Plaines got city status in 1987
Sainte-Anne-des-Plaines has a warm summer humid continental climate (Köppen climate classification Dfb) with warm or hot summers and cold winters the record low is -41 ðC (-41 ðF) on January 15, 1957 The highest temperature was 36 ðC (97 ðF) on August 1, 1975
In the 2021 Census of Population conducted by Statistics Canada, Sainte-Anne-des-Plaines had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of , it had a population density of in 2021.
The Commission scolaire de la Seigneurie-des-Mille-ÃÂles (CSSMI) operates French-language schools.
Sir Wilfrid Laurier School Board operates the English-language public schools.
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