Lac à William-Bonneau is a Lake located in Lac-Ashuapmushuan; Le Domaine-du-Roy, Quebec.

• Latitude: 48° 15' 44'' North   (decimal: 48.2622222)
• Longitude: 72° 27' 16'' West   (decimal: -72.4544444)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Lac à William-Bonneau
• GPS Coordinate Locator Map: Lac à William-Bonneau Lat/Long