Warrenton
- County:
- Fauquier County
- County Seat:
- Yes
- Area (mi²):
- 4.38
- State:
- Virginia
Warrenton is a town located in Fauquier County, Virginia. Warrenton has a 2026 population of 10,224. It is also the county seat of Fauquier County. Warrenton is currently declining at a rate of 0% annually and its population has increased by 1.75% since the most recent census, which recorded a population of 10,048 in 2020.