Lac Dejean is a Lake located in Baie-James; Jamésie, Quebec.

• Latitude: 52° 15' 55'' North   (decimal: 52.2653602)
• Longitude: 73° 35' 58'' West   (decimal: -73.5993207)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Dejean
• GPS Coordinate Locator Map: Lac Dejean Lat/Long