Boroughs of New York City
New York City is composed of five boroughs: The Bronx, Brooklyn, Manhattan, Queens, and Staten Island. Each borough is coextensive with a respective county of New York State, making New York City one of the U.S. municipalities in multiple counties. The boroughs of Queens and the Bronx are also Queens County and Bronx County. The other three counties are named differently from their boroughs: Manhattan is New York County, Brooklyn is Kings County, and Staten Island is Richmond County.
All five boroughs came into existence with the creation of modern New York City in 1898, when New York County (including The Bronx), Kings County, part of Queens County, and Richmond County were consolidated within one municipal government under a new city charter. All former municipalities within the newly consolidated city were eliminated.
New York City was originally confined to Manhattan Island and the smaller surrounding islands that formed New York County. As the city grew northward, it began annexing areas on the mainland, absorbing territory from Westchester County into New York County in 1874 (West Bronx) and 1895 (East Bronx). During the 1898 consolidation, this territory was organized as the Borough of the Bronx, though still part of New York County. In 1914, Bronx County was split off from New York County so that each borough was then coterminous with a county.
When the western part of Queens County was consolidated with New York City in 1898, that area became the Borough of Queens. In 1899, the remaining eastern section of Queens County was split off to form Nassau County, thereafter making the borough and county of Queens coextensive with each other.