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

• Latitude: 48° 43' 23'' North   (decimal: 48.7230556)
• Longitude: 73° 36' 38'' West   (decimal: -73.6105556)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Lac John
• GPS Coordinate Locator Map: Lac John Lat/Long