Marys Island is a Island located in Peterborough, Ontario and has an elevation of 195 meters.

• Latitude: 44° 29' 20'' North   (decimal: 44.4888888)
• Longitude: 77° 49' 34'' West   (decimal: -77.8261111)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 195 meters
• Location: Peterborough
• Atlas of Canada Locator Map: Marys Island
• GPS Coordinate Locator Map: Marys Island Lat/Long