Lac à Oscar is a Lake located in Marsoui; La Haute-Gaspésie, Quebec.

• Latitude: 49° 5' 3'' North   (decimal: 49.0842116)
• Longitude: 66° 1' 56'' West   (decimal: -66.0321673)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Marsoui; La Haute-Gaspésie
• Atlas of Canada Locator Map: Lac à Oscar
• GPS Coordinate Locator Map: Lac à Oscar Lat/Long