Lac à Poseau is a Lake located in L'Anse-Saint-Jean; Le Fjord-du-Saguenay, Quebec.

• Latitude: 48° 12' 21'' North   (decimal: 48.2058590)
• Longitude: 70° 12' 34'' West   (decimal: -70.2095096)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: L'Anse-Saint-Jean; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac à Poseau
• GPS Coordinate Locator Map: Lac à Poseau Lat/Long