Day Island is a Island located in Mackenzie, Northwest Territories.

• Latitude: 65° 59' 1'' North   (decimal: 65.9836076)
• Longitude: 117° 48' 6'' West   (decimal: -117.8016167)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Northwest Territories
• Location: Mackenzie
• Atlas of Canada Locator Map: Day Island
• GPS Coordinate Locator Map: Day Island Lat/Long