Lac Duc is a Lake located in Lac-Moselle; La Vallée-de-la-Gatineau, Quebec.

• Latitude: 47° 23' 40'' North   (decimal: 47.3945097)
• Longitude: 75° 26' 30'' West   (decimal: -75.4415686)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Moselle; La Vallée-de-la-Gatineau
• Atlas of Canada Locator Map: Lac Duc
• GPS Coordinate Locator Map: Lac Duc Lat/Long