Lac à Thompson is a Lake located in Franquelin; Manicouagan, Quebec.

• Latitude: 49° 18' 11'' North   (decimal: 49.3031017)
• Longitude: 67° 50' 5'' West   (decimal: -67.8347350)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Franquelin; Manicouagan
• GPS Coordinate Locator Map: Lac à Thompson Lat/Long