Sunken Island is a Island located in Lanark, Ontario and has an elevation of 131 meters.

• Latitude: 44° 50' 27'' North   (decimal: 44.8408333)
• Longitude: 76° 9' 38'' West   (decimal: -76.1605555)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 131 meters
• Location: Lanark
• Atlas of Canada Locator Map: Sunken Island
• GPS Coordinate Locator Map: Sunken Island Lat/Long