Reids Mills is a Unincorporated area located in Dundas; Carleton, Ontario and has an elevation of 91 meters.

• Latitude: 45° 6' 7'' North   (decimal: 45.1019444)
• Longitude: 75° 33' 12'' West   (decimal: -75.5533333)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Dispersed Rural Community
• Canadian Province/Territory: Ontario
• Elevation: 91 meters
• Location: Dundas; Carleton
• Atlas of Canada Locator Map: Reids Mills
• GPS Coordinate Locator Map: Reids Mills Lat/Long