Chambly is an off-island suburb of Montreal in southwestern Quebec, Canada. It is located in the Montérégie region, inland from the South Shore of the Saint Lawrence River.

Greater Montreal is the most populous metropolitan area in Quebec and the second most populous in Canada after Greater Toronto. In 2015, Statistics Canada identified Montreal's Census Metropolitan Area (CMA) as 4,258.31 square kilometres (1,644.14 sq mi) with a population of 4,027,100, almost half that of the province.