La Grosse Île is a Island located in Lac-Normand; Mékinac, Quebec.

• Latitude: 47° 8' 50'' North   (decimal: 47.1472649)
• Longitude: 73° 33' 53'' West   (decimal: -73.5648557)
• Topography Feature Category: Island
• Geographical Feature: Île / Ile
• Canadian Province/Territory: Quebec
• Location: Lac-Normand; Mékinac
• Atlas of Canada Locator Map: La Grosse Île
• GPS Coordinate Locator Map: La Grosse Île Lat/Long