CLEARFIELD, a borough of Clearfield county, Pennsylvania, U.S.A., 35m. N. of Altoona, on the west branch of the Susque hanna river, at an altitude of I,Io8ft., in the "Central Pennsyl vania" coal-field. It is on Federal highway 322 ; is served by the Buffalo, Rochester and Pittsburgh, the New York Central and the Pennsylvania railways; and has an air-port lighted by beacons. The population in 192o was 8,529; 193o it was 9,221. It is the county seat, a wholesale distributing centre, and has various man ufacturing industries, especially large fire-brick, tile and sewer-pipe works, using the fire-clay that abounds in the vicinity, a large nickel rolling-mill and tanneries. Clearfield was so named because the first white settlers found it already cleared of timber. In 1805 it was chosen as the site for the county seat.