Warrenton is a town in Fauquier County, Virginia, United States. Population was 6,670 at the 2000 census, 9,611 at the 2010 census, and 9,907 as of a 2014 estimate.
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.The Town of Warrenton was incorporated on January 5, 1810, and named for General Joseph Warren, aRevolutionary War hero. Richard Henry Lee donated the land for the county seat. John S. Horner, Secretary of Wisconsin Territory and Acting Governor of Michigan Territory, was born in Warrenton. John Marshall, the fourth Chief Justice of the U.S. Supreme Court, was from nearby Germantown, Virginia modern-day Midland. The Warrenton Historic District was listed on the National Register of Historic Places in 1983.