Merrickville Blockhouse National Historic Site of Canada is a Conservation area located in Grenville, Ontario.

• Latitude: 44° 55' 0'' North   (decimal: 44.9166999)
• Longitude: 75° 50' 15'' West   (decimal: -75.8375000)
• Topography Feature Category: Conservation area
• Geographical Feature: National Historic Site
• Canadian Province/Territory: Ontario
• Location: Grenville
• Atlas of Canada Locator Map: Merrickville Blockhouse National Historic Site of Canada
• GPS Coordinate Locator Map: Merrickville Blockhouse National Historic Site of Canada Lat/Long