Troisième lac Onésime is a Lake located in Sacré-C¿ur; La Haute-Côte-Nord, Quebec.

• Latitude: 48° 20' 46'' North   (decimal: 48.3461350)
• Longitude: 69° 59' 21'' West   (decimal: -69.9892236)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Sacré-C¿ur; La Haute-Côte-Nord
• Atlas of Canada Locator Map: Troisième lac Onésime
• GPS Coordinate Locator Map: Troisième lac Onésime Lat/Long