Lac Coom is a Lake located in Baie-James; Jamésie, Quebec.

• Latitude: 51° 10' 15'' North   (decimal: 51.1708333)
• Longitude: 72° 45' 8'' West   (decimal: -72.7522222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Coom
• GPS Coordinate Locator Map: Lac Coom Lat/Long