York, city (1990 pop. 42,192), seat of York co., SE Pa., on Codorus Creek, in an agricultural area; laid out 1741, inc. as a city 1887. It is a market, trade, processing, and distribution center in the Pennsylvania Dutch country. In addition to food and related products, its factories make monorail systems, turbines, controls, stoneware, dinnerware, nuclear components, motorcycles, armored vehicles, swimming pools, and office furniture. York was a meeting place (1777–78) of the Continental Congress. During the Civil War, it was occupied briefly (1863) by Confederates. York College of Pennsylvania and a campus of Pennsylvania State Univ. are in the city. Several colonial houses remain.