Lac à Jean is a Lake located in Lac-Nilgaut; Pontiac, Quebec.

• Latitude: 46° 29' 40'' North   (decimal: 46.4945030)
• Longitude: 77° 16' 18'' West   (decimal: -77.2716775)
• Topography Feature Category: Lake
• Geographical Feature: Étang
• Canadian Province/Territory: Quebec
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac à Jean
• GPS Coordinate Locator Map: Lac à Jean Lat/Long