Castellana Sicula is a town of about 4,300 inhabitants, located in the province of Palermo at some 765m asl. It is divided into three main quarters, namely Castellana Centro, Calcarelli and Nociazzi.

It grew up in the 18th century on the area of a former feudal holding. Its most attractive building is the Mother Church dedicated to San Francesco di Paola.

Just off the town, is the Grotta del Vecchiuzzo, a cave discovered in the early 1900s, where important prehistoric relics relating to the site of Sile di Petralia were recovered.