Mainland's Island is a Island located in Wellington, Ontario and has an elevation of 484 meters.

• Latitude: 43° 55' 16'' North   (decimal: 43.9211111)
• Longitude: 80° 26' 13'' West   (decimal: -80.4369444)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 484 meters
• Location: Wellington
• Atlas of Canada Locator Map: Mainland's Island
• GPS Coordinate Locator Map: Mainland's Island Lat/Long