Saint-Polycarpe is a Quebec municipality located in the Vaudreuil-Soulanges Regional County Municipality in the Montérégie region west of Montreal and just east of the Quebec-Ontario border. The population as of the Canada 2011 Census was 1,969.While a parish during the 18th century, its territory included portions of what is now part of Saint-Zotique located south of Autoroute 20 that links Montreal and Toronto.