Lac Sirmac is a Lake located in Baie-James; Jamésie, Quebec and has an elevation of 355 meters.

• Latitude: 50° 37' 59'' North   (decimal: 50.6330556)
• Longitude: 75° 29' 4'' West   (decimal: -75.4844444)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 355 meters
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Sirmac
• GPS Coordinate Locator Map: Lac Sirmac Lat/Long