Rapidan is a small unincorporated community in Culpeper County and Orange County, Virginia, United States. Bisected by the Rapidan River, it is home to the Rapidan historic district and dates to the 18th century, when it was a mill town known as Waugh's Ford. It was renamed Rapid Ann Station in 1854 and Rapidan in 1886. The town was mostly destroyed in the American Civil War and later became a center for the shipment of wood products.
The community and surrounding counties are served by the Rapidan Volunteer Fire Department, officially formed in 1978.