Lac à John is a Lake located in Lac-Ashuapmushuan; Le Domaine-du-Roy, Quebec and has an elevation of 326 meters.

• Latitude: 48° 32' 28'' North   (decimal: 48.5411111)
• Longitude: 72° 34' 28'' West   (decimal: -72.5744444)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 326 meters
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Lac à John
• GPS Coordinate Locator Map: Lac à John Lat/Long