Saint-Bruno-de-Montarville is an off-island suburb of Montreal, in southwestern Quebec, Canada, on the south bank of the Saint Lawrence River just east of Montreal. It lies on the west flank of Mont Saint-Bruno, one of the Monteregian Hills. The population as of the Canada 2011 Census was 26,107. It merged with Longueuil in 2002 but de-merged in 2006.