Île du Duc is a Island located in Saint-Augustin; Basse-Côte-Nord, Quebec.

• Latitude: 51° 12' 44'' North   (decimal: 51.2122793)
• Longitude: 58° 20' 19'' West   (decimal: -58.3385399)
• Topography Feature Category: Island
• Geographical Feature: Île / Ile
• Canadian Province/Territory: Quebec
• Location: Saint-Augustin; Basse-Côte-Nord
• GPS Coordinate Locator Map: Île du Duc Lat/Long