Big Green Island is a Island located in Nipissing, Ontario and has an elevation of 354 meters.

• Latitude: 45° 36' 39'' North   (decimal: 45.6108333)
• Longitude: 77° 50' 36'' West   (decimal: -77.8433333)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 354 meters
• Location: Nipissing
• Atlas of Canada Locator Map: Big Green Island
• GPS Coordinate Locator Map: Big Green Island Lat/Long