Lac Oublié is a Lake located in Lac-Matawin; Matawinie, Quebec.

• Latitude: 46° 44' 55'' North   (decimal: 46.7486529)
• Longitude: 74° 11' 24'' West   (decimal: -74.1898793)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Matawin; Matawinie
• Atlas of Canada Locator Map: Lac Oublié
• GPS Coordinate Locator Map: Lac Oublié Lat/Long