Lac Derby is a Lake located in La Tuque; Le Haut-Saint-Maurice, Quebec and has an elevation of 249 meters.

• Latitude: 47° 25' 49'' North   (decimal: 47.4302778)
• Longitude: 72° 50' 21'' West   (decimal: -72.8391667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 249 meters
• Location: La Tuque; Le Haut-Saint-Maurice
• Atlas of Canada Locator Map: Lac Derby
• GPS Coordinate Locator Map: Lac Derby Lat/Long