New York City spans five boroughs across the mouth of the Hudson River, from the Bronx mainland south through Manhattan, Queens, and Brooklyn on Long Island, to Staten Island across the harbor. The metropolitan area extends from Yonkers and Mount Vernon through Westchester County to the north, across to Nassau County suburbs like Great Neck and Hempstead on Long Island, and west into Hudson County, New Jersey communities including Jersey City and Hoboken. The city's economy runs on finance concentrated in Lower Manhattan and Midtown, healthcare systems anchored by major teaching hospitals, media and tech companies, tourism infrastructure, and the port complex. With over 8 million residents speaking hundreds of languages, the city operates as a collection of distinct neighborhoods—from Harlem to the Lower East Side, Astoria to Sunset Park, Riverdale to Far Rockaway—each with its own commercial corridors and service needs.