Sainte-Anne-des-Plaines (French pronunciation: [sɛ̃t an de plɛn]) is a city in southwestern Quebec, Canada, 40 km northwest of the city of Montreal in the Thérèse-De Blainville Regional County Municipality, in the region of Laurentides.

[5] 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),[6] and the Regional Mental Health Centre (multi).

Sainte-Anne-Des-Plaines got city status in 1987 In the 2021 Census of Population conducted by Statistics Canada, Sainte-Anne-des-Plaines had a population of 15,221 living in 5,882 of its 6,005 total private dwellings, a change of 5.5% from its 2016 population of 14,421.

[7] 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°C (-41°F) on January 15, 1957 The highest temperature was 36°C (97°F) on August 1, 1975 The Commission scolaire de la Seigneurie-des-Mille-Îles (CSSMI) operates French-language schools.

[8] Sir Wilfrid Laurier School Board operates the English-language public schools.