Garretton is a Unincorporated area located in Grenville, Ontario and has an elevation of 89 meters.

• Latitude: 44° 50' 3'' North   (decimal: 44.8341666)
• Longitude: 75° 40' 00'' West   (decimal: -75.6666666)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Dispersed Rural Community
• Canadian Province/Territory: Ontario
• Elevation: 89 meters
• Location: Grenville
• Atlas of Canada Locator Map: Garretton
• GPS Coordinate Locator Map: Garretton Lat/Long