Endwell is a hamlet located in the town of Union in Broome County, New York, United States. Its population was 11,446 at the 2010 census. Endwell is situated between the villages of Endicott and Johnson City. It is west of Binghamton and is considered a suburb of that city. Endwell is also the home of a popular local park, Highland Park, well known in the area for its annual Fourth of July fireworks display as well as its classic carousel.