Lac du Père-Ti-Jean is a Lake located in L'Ascension-de-Notre-Seigneur; Lac-Saint-Jean-Est, Quebec.

• Latitude: 48° 40' 53'' North   (decimal: 48.6813889)
• Longitude: 71° 35' 25'' West   (decimal: -71.5902778)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: L'Ascension-de-Notre-Seigneur; Lac-Saint-Jean-Est
• Atlas of Canada Locator Map: Lac du Père-Ti-Jean
• GPS Coordinate Locator Map: Lac du Père-Ti-Jean Lat/Long