Lac Saint-Cyr is a Lake located in Lac-Matawin; Matawinie, Quebec and has an elevation of 494 meters.

• Latitude: 46° 59' 16'' North   (decimal: 46.9877778)
• Longitude: 74° 24' 46'' West   (decimal: -74.4127778)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 494 meters
• Location: Lac-Matawin; Matawinie
• Atlas of Canada Locator Map: Lac Saint-Cyr
• GPS Coordinate Locator Map: Lac Saint-Cyr Lat/Long