Sinclair Island is a Island located in Mackenzie, Northwest Territories and has an elevation of 159 meters.

• Latitude: 61° 4' 0'' North   (decimal: 61.0667892)
• Longitude: 116° 38' 5'' West   (decimal: -116.6347327)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Northwest Territories
• Elevation: 159 meters
• Location: Mackenzie
• Atlas of Canada Locator Map: Sinclair Island
• GPS Coordinate Locator Map: Sinclair Island Lat/Long