Lac Voisin is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec and has an elevation of 438 meters.

• Latitude: 49° 55' 1'' North   (decimal: 49.9169444)
• Longitude: 72° 58' 14'' West   (decimal: -72.9705556)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 438 meters
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac Voisin
• GPS Coordinate Locator Map: Lac Voisin Lat/Long