Warrenton, VA -- U.S. town in Virginia Population (2000): 6670 Housing Units (2000): 2856 Land area (2000): 4.235421 sq. miles (10.969689 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 4.235421 sq. miles (10.969689 sq. km) FIPS code: 83136 Located within: Virginia (VA), FIPS 51 Location: 38.718307 N, 77.797085 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Warrenton, VA Warrenton