The United Nations Headquarters Building (also known as the United Nations Building, United Nations Headquarters) is the seat of the United Nations Headquarters and is one of the “international territories”. The United Nations Headquarters building is located in New York State (northeast on the map of the United States) the largest city, New York City (New York City) Manhattan District East, its west border is First Avenue, the south side is East 42nd Street, the north side is East 48th Street, the east side overlooks the East River.