Third Island is a Island located in Madawaska, New Brunswick and has an elevation of 152 meters.

• Latitude: 47° 17' 54'' North   (decimal: 47.2983319)
• Longitude: 68° 28' 45'' West   (decimal: -68.4792680)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: New Brunswick
• Elevation: 152 meters
• Location: Madawaska
• Atlas of Canada Locator Map: Third Island
• GPS Coordinate Locator Map: Third Island Lat/Long