Alleghany -- U.S. County in Virginia Population (2000): 12926 Housing Units (2000): 5812 Land area (2000): 444.626292 sq. miles (1151.576760 sq. km) Water area (2000): 1.041052 sq. miles (2.696311 sq. km) Total area (2000): 445.667344 sq. miles (1154.273071 sq. km) Located within: Virginia (VA), FIPS 51 Location: 37.785041 N, 79.971287 W Headwords: Alleghany Alleghany, VA Alleghany County Alleghany County, VA