Geography of New York City the coast of the Northeastern United States at the mouth of the Hudson River in southeastern New York state. It is located in the New York–New Jersey Harbor Estuary, the centerpiece of which is the New York Harbor, whose deep waters and sheltered bays helped the city grow in significance as a trading city. Much of New York is built on the three islands of Manhattan, Staten Island, and western Long Island, making land scarce and encouraging a high population density. The Hudson River flows from the Hudson Valley into New York Bay, becoming a tidal estuary that separates the
Port of New York and New Jersey of Liberty National Monument, the port district comprises all or part of seventeen counties in the region. The ten that are completely within the district are Hudson, Bergen, Essex, Union (in New Jersey), Westchester (in New York), and the five boroughs of New York City, which are coterminous with the counties of New York, Bronx, Kings, Queens, and Richmond. Abutting sections of Passaic, Middlesex, Monmouth, Morris, and Somerset in New Jersey, and Nassau and Rockland in New York are also within the district. New York Harbor is one of the world's largest natural harbors. The Atlantic Ocean is to the