St. Marys is a Town located in Perth, Ontario and has an elevation of 311 meters.

• Latitude: 43° 15' 34'' North   (decimal: 43.2594444)
• Longitude: 81° 7' 59'' West   (decimal: -81.1330555)
• Topography Feature Category: Town
• Geographical Feature: Separated Town
• Canadian Province/Territory: Ontario
• Elevation: 311 meters
• Location: Perth
• Atlas of Canada Locator Map: St. Marys
• GPS Coordinate Locator Map: St. Marys Lat/Long