Oldcastle is a Unincorporated area located in Essex, Ontario and has an elevation of 187 meters.

• Latitude: 42° 13' 36'' North   (decimal: 42.2266666)
• Longitude: 82° 57' 30'' West   (decimal: -82.9583333)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Dispersed Rural Community
• Canadian Province/Territory: Ontario
• Elevation: 187 meters
• Location: Essex
• Atlas of Canada Locator Map: Oldcastle
• GPS Coordinate Locator Map: Oldcastle Lat/Long