Paciano is a comune (municipality) in the Province of Perugia in the Italian region Umbria, located about 30km southwest of Perugia. As of 31 December 2004, it had a population of 974 and an area of 16.8km².
Paciano borders the following municipalities: Castiglione del Lago, Città della Pieve, Panicale, Piegaro.