Harkness Island is a Island located in Dundas, Ontario and has an elevation of 76 meters.

• Latitude: 44° 49' 44'' North   (decimal: 44.8288888)
• Longitude: 75° 18' 42'' West   (decimal: -75.3116666)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 76 meters
• Location: Dundas
• Atlas of Canada Locator Map: Harkness Island
• GPS Coordinate Locator Map: Harkness Island Lat/Long