Nappan Island is a Island located in Northumberland, Ontario and has an elevation of 191 meters.

• Latitude: 44° 23' 11'' North   (decimal: 44.3863888)
• Longitude: 77° 49' 16'' West   (decimal: -77.8211111)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 191 meters
• Location: Northumberland
• Atlas of Canada Locator Map: Nappan Island
• GPS Coordinate Locator Map: Nappan Island Lat/Long