Chester Creek is a tidal stream flowing through Delaware and Chester Counties in southeastern Pennsylvania, ultimately joining the Delaware River Estuary. Its character is defined by its tidal nature, with saltwater influence extending upstream to Kerlin Street in the city of Chester. The watershed features a mix of developed areas and protected lands, including significant portions owned by the Glen Mills School. The creek supports a diverse fishery that transitions from freshwater species in its upper reaches to estuarine species influenced by the tides, making it a unique and accessible urban fishery near Philadelphia.