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

• Latitude: 46° 26' 47'' North   (decimal: 46.4464478)
• Longitude: 77° 25' 15'' West   (decimal: -77.4208501)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac Ladouceur
• GPS Coordinate Locator Map: Lac Ladouceur Lat/Long