Prince William County, Virginia is located in the Blue Ridge Health District. It has 335.3 square miles of land area and is the 58th largest county in Virginia by total area. It is bordered by Fauquier, Charles, Manassas City, Fairfax, Loudoun, Stafford, and Manassas Park City Counties. There are 92 census tracts in the county. The county FIPS number is 51153.
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