Liberty Island the National Register of Historic Places since 1966, encompasses land in both states control of which is superseded by the United States. The undisputed boundary between New Jersey and New York is in the center of the Hudson River and the Upper New York Bay, with Liberty Island situated well on the New Jersey side of the water line with Liberty Island itself an exclave of the State of New York and a part of New York City, allowing the state and city of New York to retain sovereignty of Liberty Island, serve process there and collect sales tax from
Barnum Island, New York Barnum Island, New York Barnum Island is a hamlet and census-designated place (CDP) in Nassau County, New York, United States. The population was 2,414 at the 2010 census. It occupies the eastern portion of an island situated between Long Island and Long Beach. That island, previously known in its entirety as Hog Island, consists entirely of the communities of Barnum Island, Island Park, and Harbor Island. Barnum Island is an unincorporated area of the Town of Hempstead. Most of Barnum Island is separated from the Village of Island Park by the LIRR's Long Beach Branch rail line to Long Beach.