COATESVILLE, a city of Chester county, Pennsylvania, U.S.A., on the west branch of Brandywine creek, 38m. W. of Philadelphia. The Lincoln Highway is its main street, and it is served by the Pennsylvania and the Reading railways. The popu lation in 1920 was 14,515, and in 1930 was 14,582 by the Federal census. It has two important steel plants, in addition to numerous other manufacturing industries. The total factory output is valued at about $30,000,000 a year. Coatesville was founded about 180o, and was named after Jesse Coates, one of the early settlers. It was chartered as a city in 1915.