According to local tradition, the toponym comes from the “Serra del Falcone,” a rocky height at the edge of the settlement where numerous falcons nested in past times — birds of prey that gave their name to the fief and, later, to the town itself. In the 14th century, these lands were already part of the County of Caltanissetta, and the large cliff — then called Serra del Falcone — belonged to Berengario Angileri, who had received it as a gift from Peter I of Aragon. Over the years, the name evolved from Serra del Falcone to Serra del Falco, and finally to Serradifalco, reflecting the area’s ancient role as a refuge for birds of prey and the distinctive morphology of the terrain, characterized by limestone terraces and steep cliffs where falcons reigned supreme.
The village itself was officially established in 1640 when Francesco Graffeo obtained the jus populandi and founded the new community; a few years later, in 1652, the fief passed to the Lo Faso family, which promoted significant economic, demographic, and cultural development, leaving a mark still visible today in the Baroque architecture of the town center.