Dome Extension is a Unincorporated area located in Cochrane, Ontario and has an elevation of 301 meters.

• Latitude: 48° 27' 45'' North   (decimal: 48.4624999)
• Longitude: 81° 13' 59'' West   (decimal: -81.2330555)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Locality
• Canadian Province/Territory: Ontario
• Elevation: 301 meters
• Location: Cochrane
• Atlas of Canada Locator Map: Dome Extension
• GPS Coordinate Locator Map: Dome Extension Lat/Long