Lac O'Hea is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec.

• Latitude: 49° 35' 45'' North   (decimal: 49.5958939)
• Longitude: 72° 16' 31'' West   (decimal: -72.2753543)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac O'Hea
• GPS Coordinate Locator Map: Lac O'Hea Lat/Long