Big Marsh is a Low vegetation located in Northumberland, New Brunswick and has an elevation of 10 meters.

• Latitude: 47° 21' 0'' North   (decimal: 47.3500017)
• Longitude: 65° 6' 00'' West   (decimal: -65.0999965)
• Topography Feature Category: Low vegetation
• Geographical Feature: Marsh
• Canadian Province/Territory: New Brunswick
• Elevation: 10 meters
• Location: Northumberland
• Atlas of Canada Locator Map: Big Marsh
• GPS Coordinate Locator Map: Big Marsh Lat/Long