Boroughs of New York City

The Bronx () is a borough of New York City, coterminous with Bronx County, in the U.S. state of New York, the third-most densely populated county in the United States. It is south of Westchester County; northeast and east of Manhattan, across the Harlem River; and north of Queens, across the East River.

Manhattan (), often referred to by residents of the New York City area as the City, is the most densely populated of the five boroughs of New York City, and coextensive with the County of New York, one of the original counties of the U.S. state of New York. Manhattan serves as the city's economic and administrative center, cultural identifier, and historical birthplace. The borough consists mostly of Manhattan Island, bounded by the Hudson, East, and Harlem rivers; several small adjacent islands; and Marble Hill, a small neighborhood now on the U.S. mainland, that was connected using landfill to the Bronx and separated from the rest of Manhattan by the Harlem River. Manhattan Island is divided into three informally bounded components, each aligned with the borough's long axis: Lower, Midtown, and Upper Manhattan.

New York City encompasses five county-level administrative divisions called boroughs: The Bronx, Brooklyn, Manhattan, Queens, and Staten Island. All five boroughs are part of New York City, and each borough is coterminous with a respective county. The boroughs of Queens and The Bronx are concurrent with the counties of the same name, while the boroughs of Manhattan, Brooklyn, and Staten Island correspond to New York, Kings, and Richmond counties, respectively.

Queens is a borough of New York City, coterminous with Queens County, in the U.S. state of New York. It is the largest borough geographically and is adjacent to the borough of Brooklyn at the western end of Long Island. To its east is Nassau County. Queens also shares water borders with the boroughs of Manhattan and the Bronx. The borough of Queens is the second largest in population (after Brooklyn), with an estimated population of 2,278,906 residents in 2018, approximately 47.5 percent of them foreign-born. Queens County also is the second most populous county in the U.S. state of New York, behind Brooklyn, which is coterminous with Kings County. Queens is the fourth most densely populated county among New York City's boroughs, as well as in the United States. If each of New York City's boroughs were an independent city, Queens would be the nation's fourth most populous, after Los Angeles, Chicago, and Brooklyn. Queens is the most ethnically diverse urban area in the world.

Brooklyn () is a borough of New York City, coterminous with Kings County, located in the U.S. state of New York, the most populous county in the state, and the second-most densely populated county in the United States. It is New York City's most populous borough, with an estimated 2,504,700 residents in 2010. Named after the Dutch village of Breukelen, it borders the borough of Queens at the western end of Long Island. Brooklyn has several bridge and tunnel connections to the borough of Manhattan across the East River, and the Verrazzano-Narrows Bridge connects it with Staten Island.

Staten Island () is a borough of New York City, coterminous with Richmond County, in the U.S. state of New York. Located in the southwest portion of the city, the borough is separated from New Jersey by the Arthur Kill and the Kill Van Kull and from the rest of New York by New York Bay. With an estimated population of 476,179 in 2018, Staten Island is the least populated of the boroughs but is the third-largest in land area at 58.5 sq mi (152 km). The borough also contains the southern-most point in the state, South Point.