MacWilliams Marsh is a Low vegetation located in Northumberland, New Brunswick and has an elevation of 1 meters.

• Latitude: 47° 23' 36'' North   (decimal: 47.3934243)
• Longitude: 64° 54' 26'' West   (decimal: -64.9072925)
• Topography Feature Category: Low vegetation
• Geographical Feature: Marsh
• Canadian Province/Territory: New Brunswick
• Elevation: 1 meters
• Location: Northumberland
• Atlas of Canada Locator Map: MacWilliams Marsh
• GPS Coordinate Locator Map: MacWilliams Marsh Lat/Long