Port Ewen is a hamlet in Ulster County, New York, United States. The population was 3,678 at the 2020 census. Port Ewen is in the Town of Esopus, south of Kingston, along U.S. Route 9W.

Esopus is a town in Ulster County, New York, United States. The population was 9,548 at the 2020 census. The town was named after the local indigenous tribe and means "small river" in English. They were one of the Lenape (Delaware) bands, belonging to a people who ranged from western Connecticut through lower New York, western Long Island, and parts of New Jersey and Pennsylvania along the Delaware River. The town is on the west bank of the Hudson River south of the city of Kingston. Its center is in Port Ewen. US Route 9W passes along the eastern side of the town.