Saint-Valentin is a municipality in southern Quebec, Canada located in the administrative area of the Montérégie. The population as of the Canada 2011 Census was 470. Named after the Christian hallow Saint Valentine, the community has been trying to capitalize on its name as a destination for lovers since the 1990s. A Festival de la Saint-Valentin is held ever…Saint-Valentin is a municipality in southern Quebec, Canada located in the administrative area of the Montérégie. The population as of the Canada 2011 Census was 470. Named after the Christian hallow Saint Valentine, the community has been trying to capitalize on its name as a destination for lovers since the 1990s. A Festival de la Saint-Valentin is held every February, along with a St. Valentine's Day Mass. The post office frequently receives letters from around the world to postmark.