Lac Sirois is a Lake located in Baie-James; Jamésie, Quebec and has an elevation of 242 meters.

• Latitude: 49° 59' 16'' North   (decimal: 49.9877777)
• Longitude: 78° 55' 37'' West   (decimal: -78.9269444)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 242 meters
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Sirois
• GPS Coordinate Locator Map: Lac Sirois Lat/Long