Chertsey is a municipality in the regional county municipality of Matawinie in Quebec, Canada, located in the administrative region of Lanaudière.

The diocesan shrine Mary Queen of Hearts (Marie-Reine-des-Coeurs) is in Chertsey.

[4] Lake Beaulac, the lake with the highest elevation in Lanaudière, was annexed by the municipality in 1991.

Private dwellings occupied by usual residents: 2,720 (total dwellings: 4,255) Mother tongue:[6] Centre de services scolaire des Samares operates Francophone public schools: Sir Wilfrid Laurier School Board operates Anglophone public schools: