New Philadelphia, city (1990 pop. 15,698), seat of Tuscarawas co., E Ohio, on the Tuscarawas River, in a coal and clay area; founded 1804, inc. 1833. Foundry products, machinery, and pottery are made. The Tuscarawas Campus of Kent State Univ. is there. Nearby is the Schoenbrunn Village State Memorial, a reconstruction of the first settlement in Ohio.