Warrenton is a town in Fauquier County, Virginia, United States. The population was 6,670 at the 2000 census, and 14,634 at the 2010 estimate. 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. The town is in the Piedmont region of Virginia, near the Blue Ridge Mountains. The well-known Airlie Conference Center is on the northeast boundary of Warrenton, and the historic Vint Hill Farms military facility is several miles east. Fauquier Hospital is also located in the town.
Like many incorporated towns in Virginia, the town of Warrenton has government and taxation separate from the county. The town and the county do share some services, such as schools and the county landfill.
The settlement which would grow into the Town of Warrenton began as a cross roads at the junction of the Falmouth-Winchester and Alexandria-Culpeper roads., where a trading post called the Red Store was located. In the 1790s, a courthouse was built in the area, and the location was known as Fauquier Courthouse.