Ulster Heights Synagogue, formally known as Congregation Knesset Israel of Ulster Heights, is located at the corner of Beaver Dam and Ulster Heights roads in the Ulster Heights section of the town of Wawarsing, New York, United States. It was built in 1924 by the early Jewish settlers of the southeastern Catskill region. In 2001 it was added to the National Register of Historic Places as a relatively intact example of a vernacular rural synagogue typical of the region.