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is a hamlet in the town of Deerpark in Orange County, New York, United States, along US 209. Westbrookville was named for Dirck Van Keuren Westbrook, an early settler. Fort Westbrook, dating back to the American Revolution, is extant. The 1900-1930 US Census lists it as part of Mamakating in Sullivan County, New York. Situated between Port Jervis and Wurtsboro, it is close to the borders of Pennsylvania and New Jersey. It is located within the Port Jervis City School districts, and shares its zip code with Port Jervis. It contains many small businesses, Westbrookville Cemetery. The city once housed the J. E. Ashworth & Sons blanket mill.