Boisbriand is an off-island suburb of Montreal, at the entrance of the Lower-Laurentides in southwestern Quebec, Canada, on the north shore of the Rivière des Mille Îles in the Thérèse-De Blainville Regional County Municipality. Although relatively small, Boisbriand is bisected by three highways: Highway 13 on the west, Highway 15 on the east, and Highway 640 in the middle/north.