Tomisidenik Island is a Island located in Cochrane, Ontario and has an elevation of 5 meters.

• Latitude: 51° 17' 55'' North   (decimal: 51.2986111)
• Longitude: 80° 31' 50'' West   (decimal: -80.5305555)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 5 meters
• Location: Cochrane
• Atlas of Canada Locator Map: Tomisidenik Island
• GPS Coordinate Locator Map: Tomisidenik Island Lat/Long