Mortimer Island is a Island located in Thunder Bay, Ontario and has an elevation of 203 meters.

• Latitude: 48° 41' 7'' North   (decimal: 48.6852777)
• Longitude: 87° 1' 55'' West   (decimal: -87.0319444)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 203 meters
• Location: Thunder Bay
• Atlas of Canada Locator Map: Mortimer Island
• GPS Coordinate Locator Map: Mortimer Island Lat/Long