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

• Latitude: 49° 17' 15'' North   (decimal: 49.2875)
• Longitude: 74° 18' 54'' West   (decimal: -74.3149999)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• GPS Coordinate Locator Map: Lac Jack Lat/Long