Saint-Léonard is a Canadian town in Madawaska County, New Brunswick. It is located on the east bank of the Saint John River opposite Van Buren, Maine, to which it is connected via the Saint Leonard-Van Buren Bridge. The town's economy is driven by potato farming and a J. D. Irving Limited sawmill. Saint-Léonard is officially bilingual but it is predominantly a Francophone community. It has a single school, École Grande-Riviere. Saint-Léonard was once a popular town during Prohibition in the United States as it was easy to smuggle alcohol to Van Buren.