Cowansville is a town in south-central Quebec, Canada, located on Lac Davignon 20 kilometres north of the U.S. border. It is the seat of Brome-Missisquoi, a regional county municipality. The population as of the Canada 2021 Census was 15,234. In recent years, Cowansville has seen its commercial activity blossom mainly due to its proximity to a major freeway, Autoroute 10, and the Eastern Townships ski resort region.