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

• Latitude: 54° 54' 5'' North   (decimal: 54.9013889)
• Longitude: 71° 2' 19'' West   (decimal: -71.0386111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Coulanges
• GPS Coordinate Locator Map: Lac Coulanges Lat/Long