It initially comprised the Parishes of Boucherville, Longueuil, St. Bruno and Chambly. In 1892, it was redefined to consist of the town of Longueuil, the villages of Verchères, Boucherville, Chambly Basin, Chambly Canton and Varennes, the municipality of St. Lambert, and the parishes of Boucherville, Chambly, Longueuil, St. Basile le Grand, St. Bruno, St. Hubert, Varennes, Ste. Julie, Verchères,
Contrecoeur, Ste. Théodosie, St. Antoine, St. Marc and Beloeil. In 1924, it was redefined to consist of the Counties of Chambly and Verchères including the Cities of Longueuil and St. Lambert. When it was recreated in 1966, it was defined to consist of: • the City of Chambly; • the Towns of Beloeil, Boucherville, Saint-Bruno-de-Montarville and Saint-Hubert; • the Counties of Chambly and Verchères; • in the County of Richelieu: the parish municipality of Saint-Roch-de-Richelieu; • in the County of Laprairie: the municipality of Notre-Dame; • in the County of Rouville: the village municipality of Richelieu; the parish municipalities of Notre-Dame-de-Bon-Secours and Saint-Mathias. In 1976, it was redefined to consist of: • the Cities of Chambly and Saint Hubert; • the Towns of Carignan, Marieville, Richelieu, and Saint-Bruno-de-Montarville; • in the County of Rouville: the parish municipalities of Notre-Dame-de-Bon-Secours, Sainte-Marie-de-Monnoir and Saint-Mathias. In 1987, it was redefined to consist of: • the towns of Beloeil, Carignan, Chambly, Mont-Saint-Hilaire, Otterburn Park, Richelieu, Saint-Basile-le-Grand and Saint-Bruno-de-Montarville; • in the County of Verchères: the Village Municipality of McMasterville; • in the County of Rouville: the parish municipalities of Notre-Dame-de-Bon-Secours and Saint-Mathias. In 1996, it was redefined to consist of: • the cities of Beloeil, Carignan, Chambly, Marieville, Mont-Saint-Hilaire, Otterburn Park, Richelieu and Saint-Basile-le-Grand; • the County Regional Municipality of Rouville, excepting: the City of Saint-Césaire; the village municipalities of
Ange-Gardien and Rougemont; the parish municipalities of Saint-Ange-Gardien, Saint-Césaire, Saint-Michel-de-Rougemont, Saint-Paul-d'Abbotsford and Sainte-Angèle-de-Monnoir; • in the County Regional Municipality of La Vallée-du-Richelieu: the Village Municipality of McMasterville; the Municipality of Saint-Mathieu-de-Beloeil. ==Geography==