Lac Serpent is a Lake located in Lac-Douaire; Antoine-Labelle, Quebec.

• Latitude: 47° 8' 50'' North   (decimal: 47.1472222)
• Longitude: 75° 43' 52'' West   (decimal: -75.7311111)
• Topography Feature Category: Lake
• Geographical Feature: Étang
• Canadian Province/Territory: Quebec
• Location: Lac-Douaire; Antoine-Labelle
• Atlas of Canada Locator Map: Lac Serpent
• GPS Coordinate Locator Map: Lac Serpent Lat/Long