Marine Park is the name of a neighborhood and the largest public park in the New York City borough of Brooklyn, that lies between Flatlands and Mill Basin to the east, and Gerritsen Beach, Midwood, and Sheepshead Bay to the south and west. The neighborhood is mostly squared off in area by Gerritsen Avenue, Flatbush Avenue, Avenue U and Kings Highway. The eponymous park is within the neighborhood. The neighborhood is largely made up of ethnic groups such as Italians, Irish, Greeks, and Jews. The area is part of Brooklyn Community Board 18. Charles Downing Lay won a silver medal in town planning at the 1936 Olympics for the planning of Marine Park.