La Démanche is a Island located in Baie-James; Jamésie, Quebec.

• Latitude: 54° 18' 34'' North   (decimal: 54.3095609)
• Longitude: 70° 13' 40'' West   (decimal: -70.2277611)
• Topography Feature Category: Island
• Geographical Feature: Île / Ile
• Canadian Province/Territory: Quebec
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: La Démanche
• GPS Coordinate Locator Map: La Démanche Lat/Long