Lac Saint-Onge is a Lake located in Saint-Donat; Matawinie, Quebec and has an elevation of 453 meters.

• Latitude: 46° 22' 16'' North   (decimal: 46.3711524)
• Longitude: 74° 8' 00'' West   (decimal: -74.1332137)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 453 meters
• Location: Saint-Donat; Matawinie
• Atlas of Canada Locator Map: Lac Saint-Onge
• GPS Coordinate Locator Map: Lac Saint-Onge Lat/Long