Pittsylvania County Courthouse is a building in Chatham, Virginia, USA. It is located on the east side of US Business Route 29.This Greek Revival building was erected in 1853 as the third courthouse of Pittsylvania county. The county, formed in 1767, and the town of Chatham were named for William Pitt, First Earl of Chatham. The present court house replaced a structure built in 1783, one block West of where the old offices of the clerk still stands.