Lac à Jack is a Lake located in Lac-Pikauba; Charlevoix, Quebec.

• Latitude: 47° 53' 5'' North   (decimal: 47.8847494)
• Longitude: 70° 38' 31'' West   (decimal: -70.6420237)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Pikauba; Charlevoix
• Atlas of Canada Locator Map: Lac à Jack
• GPS Coordinate Locator Map: Lac à Jack Lat/Long