Arlington -- U.S. County in Virginia Population (2000): 189453 Housing Units (2000): 90426 Land area (2000): 25.869896 sq. miles (67.002719 sq. km) Water area (2000): 0.094015 sq. miles (0.243499 sq. km) Total area (2000): 25.963911 sq. miles (67.246218 sq. km) Located within: Virginia (VA), FIPS 51 Location: 38.880344 N, 77.108260 W Headwords: Arlington Arlington, VA Arlington County Arlington County, VA