Grayson -- U.S. County in Virginia Population (2000): 17917 Housing Units (2000): 9123 Land area (2000): 442.638528 sq. miles (1146.428475 sq. km) Water area (2000): 3.264740 sq. miles (8.455638 sq. km) Total area (2000): 445.903268 sq. miles (1154.884113 sq. km) Located within: Virginia (VA), FIPS 51 Location: 36.648348 N, 81.171894 W Headwords: Grayson Grayson, VA Grayson County Grayson County, VA