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

• Latitude: 49° 22' 21'' North   (decimal: 49.3725497)
• Longitude: 68° 28' 47'' West   (decimal: -68.4797605)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-aux-Outardes; Manicouagan
• Atlas of Canada Locator Map: Lac Demers
• GPS Coordinate Locator Map: Lac Demers Lat/Long