Lac-des-Plaines is a Unincorporated area located in Saint-Cyrille-de-Lessard; L'Islet, Quebec.

• Latitude: 47° 4' 0'' North   (decimal: 47.0666882)
• Longitude: 70° 7' 28'' West   (decimal: -70.1245129)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Secteur
• Canadian Province/Territory: Quebec
• Location: Saint-Cyrille-de-Lessard; L'Islet
• Atlas of Canada Locator Map: Lac-des-Plaines
• GPS Coordinate Locator Map: Lac-des-Plaines Lat/Long