Main Duck Island is a Island located in Prince Edward, Ontario and has an elevation of 78 meters.

• Latitude: 43° 55' 44'' North   (decimal: 43.9288888)
• Longitude: 76° 37' 26'' West   (decimal: -76.6238888)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 78 meters
• Location: Prince Edward
• Atlas of Canada Locator Map: Main Duck Island
• GPS Coordinate Locator Map: Main Duck Island Lat/Long