Washington -- U.S. County in Virginia Population (2000): 51103 Housing Units (2000): 22985 Land area (2000): 562.860490 sq. miles (1457.801914 sq. km) Water area (2000): 3.121059 sq. miles (8.083506 sq. km) Total area (2000): 565.981549 sq. miles (1465.885420 sq. km) Located within: Virginia (VA), FIPS 51 Location: 36.712823 N, 81.958680 W Headwords: Washington Washington, VA Washington County Washington County, VA