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

• Latitude: 49° 21' 29'' North   (decimal: 49.3581042)
• Longitude: 68° 23' 21'' West   (decimal: -68.3892016)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-aux-Outardes; Manicouagan
• Atlas of Canada Locator Map: Lac Perdu
• GPS Coordinate Locator Map: Lac Perdu Lat/Long