Lac Jack is a Lake located in Lac-Walker; Sept-Rivières, Quebec.

• Latitude: 49° 47' 55'' North   (decimal: 49.7986573)
• Longitude: 67° 22' 53'' West   (decimal: -67.3813473)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Walker; Sept-Rivières
• Atlas of Canada Locator Map: Lac Jack
• GPS Coordinate Locator Map: Lac Jack Lat/Long