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

• Latitude: 49° 21' 35'' North   (decimal: 49.3597613)
• Longitude: 72° 14' 53'' West   (decimal: -72.2480818)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac du Guillemot
• GPS Coordinate Locator Map: Lac du Guillemot Lat/Long