Weir is a Unincorporated area located in Wentworth, Ontario.

• Latitude: 43° 13' North   (decimal: 43.2167000)
• Longitude: 80° 11' West   (decimal: -80.1833000)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Locality
• Canadian Province/Territory: Ontario
• Location: Wentworth
• GPS Coordinate Locator Map: Weir Lat/Long