Warrenton is a town in Fauquier County, Virginia, United States. In 2011, Fauquier County was number eight on the U.S. Census Bureau list of highest-income counties in the United States. Population was 6,670 at the 2000 census, and 9,611 at the 2010 census. It is the county seat of Fauquier County. Public schools in the town include Fauquier High School, Warrenton Middle School, Taylor Middle School, and two elementary schools. There are two private schools in Warrenton: Highland School and St. John The Evangelist's Catholic School. Warrenton is at a junction of U.S. Route 15, U.S. Route 17, U.S. Route 29, and U.S. Route 211.