Dunmark Lake is a Lake located in Wentworth, Ontario and has an elevation of 213 meters.

• Latitude: 43° 11' 26'' North   (decimal: 43.1905555)
• Longitude: 80° 5' 43'' West   (decimal: -80.0952777)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 213 meters
• Location: Wentworth
• Atlas of Canada Locator Map: Dunmark Lake
• GPS Coordinate Locator Map: Dunmark Lake Lat/Long