Boisbriand is an off-island suburb of Montreal, in southwestern Quebec, Canada, on the north shore of the Rivière des Mille Îles in the Thérèse-De Blainville Regional County Municipality. The Hasidic community of Kiryas Tosh is located within the city limits and make up about 10% of its population. The rapidly growing community of 470 families and about 2,700 people was home to the former Tosher Rebbe, Meshulim Feish (Ferencz) Lowy, who established the community in 1963.