Big Marsh is a Unincorporated area located in Antigonish, Nova Scotia and has an elevation of 93 meters.

• Latitude: 45° 43' 57'' North   (decimal: 45.7325000)
• Longitude: 62° 0' 43'' West   (decimal: -62.0119444)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Community
• Canadian Province/Territory: Nova Scotia
• Elevation: 93 meters
• Location: Antigonish
• Atlas of Canada Locator Map: Big Marsh
• GPS Coordinate Locator Map: Big Marsh Lat/Long