Coney Island is a peninsula, formerly an island, in southernmost Brooklyn, New York City, USA, with a beach on the Atlantic Ocean. The neighborhood of the same name is a community of 60,000 people in the western part of the peninsula, with Seagate to its west; Brighton Beach and Manhattan Beach to its east; and Gravesend to the north. The area was a major resort and site of amusement parks that reached its peak in the early 20th century.