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

• Latitude: 49° 38' 38'' North   (decimal: 49.6438889)
• Longitude: 68° 45' 22'' West   (decimal: -68.7561111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-aux-Outardes; Manicouagan
• Atlas of Canada Locator Map: Lac Arthur
• GPS Coordinate Locator Map: Lac Arthur Lat/Long