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is a hamlet (and census-designated place) in Ulster County, New York, United States. The population was 3,650 at the 2000 census.
Port Ewen is in the Town of Esopus, south of Kingston, New York, along U.S. Route 9W.
According to the United States Census Bureau, the CDP has a total area of 2.7 square miles (6.9 km²), of which, 2.0 square miles (5.1 km²) of it is land and 0.7 square miles (1.9 km²) of it (26.97%) is water.