Lac Saint-Guillaume is a Lake located in Stoneham-et-Tewkesbury; La Jacques-Cartier, Quebec and has an elevation of 498 meters.

• Latitude: 47° 8' 54'' North   (decimal: 47.1483529)
• Longitude: 71° 24' 58'' West   (decimal: -71.4162069)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 498 meters
• Location: Stoneham-et-Tewkesbury; La Jacques-Cartier
• Atlas of Canada Locator Map: Lac Saint-Guillaume
• GPS Coordinate Locator Map: Lac Saint-Guillaume Lat/Long