Lac Alga is a Lake located in Lac-Oscar; Antoine-Labelle, Quebec.

• Latitude: 47° 10' 52'' North   (decimal: 47.1811111)
• Longitude: 74° 54' 54'' West   (decimal: -74.915)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Oscar; Antoine-Labelle
• Atlas of Canada Locator Map: Lac Alga
• GPS Coordinate Locator Map: Lac Alga Lat/Long