Lac à Mon Oncle is a Lake located in Saint-Guillaume-Nord; Matawinie, Quebec and has an elevation of 535 meters.

• Latitude: 46° 30' 38'' North   (decimal: 46.5105956)
• Longitude: 74° 1' 7'' West   (decimal: -74.0184861)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 535 meters
• Location: Saint-Guillaume-Nord; Matawinie
• Atlas of Canada Locator Map: Lac à Mon Oncle
• GPS Coordinate Locator Map: Lac à Mon Oncle Lat/Long