Big Marsh Island is a Island located in Kenora, Ontario and has an elevation of 334 meters.

• Latitude: 49° 6' 17'' North   (decimal: 49.1047222)
• Longitude: 94° 11' 13'' West   (decimal: -94.1869444)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 334 meters
• Location: Kenora
• Atlas of Canada Locator Map: Big Marsh Island
• GPS Coordinate Locator Map: Big Marsh Island Lat/Long