The Port of Chester is an American port on the west bank of the Delaware River in Delaware County, Pennsylvania. Centered around Chester, it ranges into Marcus Hook to the south and Eddystone to the north. It is part of the Delaware Valley port complex and lies between the Port of Wilmington and the Port of Philadelphia. Traditionally, shipbuilding and later automobile assembly were the mainstays of the port. It has since given way to other manufacturing and recreational activities, with Penn Terminals the only traditional maritime facility.