The city resides on the north shore of the St. Lawrence River and Lake Saint Francis and along the Quebec City–Windsor Corridor, the most populated area in Canada.

Subsequently, it was also known as "Longueuil-sur-le-Lac" (because it was part of the seigneury of New Longueuil, and "Moulin-Biron" (named after the owner of the first sawmill built near the wharf).

[10] Saint-Zotique forms part of the federal electoral district of Salaberry—Suroît and has been represented by Claude DeBellefeuille of the Bloc Québécois since 2019.

Provincially, Saint-Zotique is part of the Soulanges electoral district and is represented by Marilyne Picard of the Coalition Avenir Québec since 2018.

List of former mayors:[13] Located on Route 338 and just south of Autoroute 20 near the Ontario-Quebec border, it is easily accessible from the busiest transportation corridor of the country with direct links to Montreal, Cornwall and Toronto.