Brooklyn is a borough of New York City, coterminous with Kings County, 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. Source: Wikipedia