Longueuil, QC sits on the south shore of the Saint Lawrence River directly across from Montreal. The population as of the Canada 2011 Census totaled 231,409, making it Montreal's second largest suburb, the fifth most populous city in Quebec.
Longueuil is a residential, commercial and industrial city. It incorporates some urban features, but is essentially a suburb. Longueuil can be classified as a commuter town as a large portion of its residents commute to work in Montreal.
The city consists of three boroughs:
These boroughs bear the names of the former municipalities from which they grew. The regional municipality of Champlain County (the former MRC de Champlain) has been integrated into Ville de Longueuil in 2002. The borough of Vieux-Longueuil combines the two former municipalities of Longueuil and LeMoyne. Longueuil is the centre-city of the agglomération de Longueuil with the cities of Boucherville, Brossard, Saint-Lambert and Saint-Bruno-de-Montarville.