Thedford Marsh is a Low vegetation located in Lambton; Huron; Middlesex, Ontario and has an elevation of 181 meters.

• Latitude: 43° 13' 38'' North   (decimal: 43.2272222)
• Longitude: 81° 49' 8'' West   (decimal: -81.8188888)
• Topography Feature Category: Low vegetation
• Geographical Feature: Marsh
• Canadian Province/Territory: Ontario
• Elevation: 181 meters
• Location: Lambton; Huron; Middlesex
• Atlas of Canada Locator Map: Thedford Marsh
• GPS Coordinate Locator Map: Thedford Marsh Lat/Long