Saint-Mathias is a Unincorporated area located in Saint-Mathias-sur-Richelieu; Rouville, Quebec.

• Latitude: 45° 28' 33'' North   (decimal: 45.4758727)
• Longitude: 73° 16' 8'' West   (decimal: -73.2690220)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Bureau de poste
• Canadian Province/Territory: Quebec
• Location: Saint-Mathias-sur-Richelieu; Rouville
• GPS Coordinate Locator Map: Saint-Mathias Lat/Long