Lac Langlois is a Lake located in Rivière-aux-Outardes; Manicouagan, Quebec.

• Latitude: 49° 34' 2'' North   (decimal: 49.5672736)
• Longitude: 68° 20' 11'' West   (decimal: -68.3364206)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-aux-Outardes; Manicouagan
• Atlas of Canada Locator Map: Lac Langlois
• GPS Coordinate Locator Map: Lac Langlois Lat/Long