Lac Joan is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec and has an elevation of 449 meters.

• Latitude: 49° 19' 52'' North   (decimal: 49.3311111)
• Longitude: 73° 9' 8'' West   (decimal: -73.1522221)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 449 meters
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac Joan
• GPS Coordinate Locator Map: Lac Joan Lat/Long