Dennison Island is a Island located in Haliburton, Ontario and has an elevation of 358 meters.

• Latitude: 45° 18' 31'' North   (decimal: 45.3086111)
• Longitude: 78° 43' 46'' West   (decimal: -78.7294444)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 358 meters
• Location: Haliburton
• Atlas of Canada Locator Map: Dennison Island
• GPS Coordinate Locator Map: Dennison Island Lat/Long