Lac Doudan is a Lake located in Rivière-Koksoak; Kativik, Quebec.

• Latitude: 57° 41' 4'' North   (decimal: 57.6843127)
• Longitude: 65° 51' 50'' West   (decimal: -65.8638859)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Doudan
• GPS Coordinate Locator Map: Lac Doudan Lat/Long