Big Mary Island is a Island located in Sudbury, Ontario and has an elevation of 238 meters.

• Latitude: 46° 12' 5'' North   (decimal: 46.2013888)
• Longitude: 81° 18' 21'' West   (decimal: -81.3058333)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 238 meters
• Location: Sudbury
• Atlas of Canada Locator Map: Big Mary Island
• GPS Coordinate Locator Map: Big Mary Island Lat/Long