Lac William is a Lake located in Gore; Argenteuil, Quebec.

• Latitude: 45° 44' 17'' North   (decimal: 45.7381000)
• Longitude: 74° 14' 00'' West   (decimal: -74.2332999)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Gore; Argenteuil
• GPS Coordinate Locator Map: Lac William Lat/Long