Jones Beach State Park is a state park in the U.S. state of New York. It is located in southern Nassau County on Jones Beach Island, a barrier island linked to Long Island by the Meadowbrook State Parkway, Wantagh State Parkway, and Ocean Parkway. The park was created during Robert Moses' administration as President of the Long Island State Park Co…Jones Beach State Park is a state park in the U.S. state of New York. It is located in southern Nassau County on Jones Beach Island, a barrier island linked to Long Island by the Meadowbrook State Parkway, Wantagh State Parkway, and Ocean Parkway. The park was created during Robert Moses' administration as President of the Long Island State Park Commission as part of the development of parkways on Long Island.