Chester County

Chester County, colloquially referred to as Chesco, is a county in the Commonwealth of Pennsylvania. It is located in the Philadelphia metropolitan area, part of the southeastern portion of the state. As of the 2020 census, the population was 545,823. increasing by 7.1% from 498,886 in 2010. The county seat is West Chester. The most populous of the county's 73 municipalities, including cities, boroughs, and townships is Tredyffrin Township. The most populous boroughs are West Chester and Phoenixville. Coatesville is the only municipality in the county that is classified as a city.