Lac du Cornet is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec.

• Latitude: 49° 38' 43'' North   (decimal: 49.6453329)
• Longitude: 72° 52' 17'' West   (decimal: -72.8715021)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac du Cornet
• GPS Coordinate Locator Map: Lac du Cornet Lat/Long