Hardcastle Island is a Island located in Parry Sound, Ontario and has an elevation of 177 meters.

• Latitude: 45° 12' 23'' North   (decimal: 45.2063888)
• Longitude: 80° 8' 24'' West   (decimal: -80.1400000)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 177 meters
• Location: Parry Sound
• Atlas of Canada Locator Map: Hardcastle Island
• GPS Coordinate Locator Map: Hardcastle Island Lat/Long