Bethpage is a small city located in northwestern Nassau County, New York, United States. It is part of the Town of Oyster Bay and is situated on the island of Long Island. The city has a population of around 16,429 people as of the 2020 census. Bethpage is known for being the home of the Grumman Aircraft Engineering Corporation, which played a significant role in the development of aviation and aerospace technology during World War II and the Cold War. The area is also noted for its golf courses, including the prominent Bethpage State Park Golf Course, which has hosted several major tournaments.