Brooklyn is a borough of New York City located at the westernmost end of Long Island in the State of New York. Formerly an independent city, the borough is coextensive with
Kings County, one of twelve original counties established under British rule in 1683 in the then Province of New York. As of the 2020 United States census, the population stood at 2,736,074, making it the most populous of the five boroughs of New York City, the most populous county in the state. Brooklyn, at 37,339.9 inhabitants per square mile (14,417.0/km
2), is the second most densely populated county in the U.S. after Manhattan, as of 2022. Had Brooklyn remained an independent city, it would today be the fourth most populous American city after the rest of New York City, Los Angeles, and Chicago.