Brooklyn (/ˈbrʊklɪn/) is the most populous borough of New York City, with a census-estimated 2,648,771 residents in 2017. Named after the Dutch village of Breukelen, it borders the borough of Queens, at the western end of Long Island. Brooklyn also has several bridge connections to the boroughs of Manhattan (across the East River) and Staten Island (across the Verrazzano Narrows Bridge). Since 1896, the borough has been coterminous with Kings County, the most populous county in the U.S. state of New York and the second-most densely populated county in the United States, after the county of New York (which is coextensive with the borough of Manhattan).
With a land area of 71 square miles (180 km2) and water area of 26 square miles (67 km2), Kings County is New York's fourth-smallest county by land area and third-smallest by total area, though it is the second-largest among the city's five boroughs. Today, if New York City dissolved, Brooklyn would rank as the third-most populous city in the U.S. after Los Angeles and Chicago.