SCIACCA, a seaport town of Sicily, in the province and 30 miles W.N.W. of Girgenti. It stands on the south coast of the island, occupying the slope of a hill, between steep cliffs; and is protected by a citadel, as well as by walls and bastions. The chief buildings in this somewhat mean-looking town are churches, convents, hospitals, and a college. In the vicinity are salt lagoons, sulphur mines, and
hot sulphur springs. Some manufactures are carried on; but the chief occupation of the people is the taking and curing of sardines. There is a small harbour, and a good anchorage; but owing to the want of shelter, the trade, which consists chiefly in the export of corn and sardines, is only carried on in summer. Pop. 12,670.