Union Jack Island is a Island located in Muskoka, Ontario and has an elevation of 181 meters.

• Latitude: 44° 51' 42'' North   (decimal: 44.8616666)
• Longitude: 79° 42' 15'' West   (decimal: -79.7041666)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 181 meters
• Location: Muskoka
• Atlas of Canada Locator Map: Union Jack Island
• GPS Coordinate Locator Map: Union Jack Island Lat/Long