Halls Mills is a Unincorporated area located in Lanark, Ontario and has an elevation of 184 meters.

• Latitude: 45° 10' 30'' North   (decimal: 45.1750000)
• Longitude: 76° 23' 57'' West   (decimal: -76.3991666)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Dispersed Rural Community
• Canadian Province/Territory: Ontario
• Elevation: 184 meters
• Location: Lanark
• Atlas of Canada Locator Map: Halls Mills
• GPS Coordinate Locator Map: Halls Mills Lat/Long