Brooklyn is New York City's most populous of five boroughs and the second-largest in size. It has the same boundaries as Kings County, which is also the most populous county in the state and the second-most densely populated county in the country after New York County/Manhattan. If it were a city, Brooklyn would be the 4th most populous in the United States.
Brooklyn has an estimated population of 2.6 million with a very high population density of 36,732 people per square mile, or 14,182 per square kilometer. The history of the borough goes back 350 years and it has long been known as a popular destination for immigrants to the United States.
