Lac des Trois Îles is a Lake located in Rivière-Nipissis; Sept-Rivières, Quebec.

• Latitude: 51° 20' 38'' North   (decimal: 51.3439416)
• Longitude: 65° 47' 36'' West   (decimal: -65.7932533)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Nipissis; Sept-Rivières
• Atlas of Canada Locator Map: Lac des Trois Îles
• GPS Coordinate Locator Map: Lac des Trois Îles Lat/Long