Castle Island is a Island located in Thunder Bay, Ontario and has an elevation of 265 meters.

• Latitude: 50° 7' 13'' North   (decimal: 50.1202777)
• Longitude: 88° 49' 7'' West   (decimal: -88.8186111)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 265 meters
• Location: Thunder Bay
• Atlas of Canada Locator Map: Castle Island
• GPS Coordinate Locator Map: Castle Island Lat/Long