Lac Margonne is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec and has an elevation of 443 meters.

• Latitude: 50° 15' 12'' North   (decimal: 50.2533333)
• Longitude: 73° 30' 17'' West   (decimal: -73.5047222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 443 meters
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac Margonne
• GPS Coordinate Locator Map: Lac Margonne Lat/Long