Gerritsen Beach is a neighborhood in the New York City borough of Brooklyn, located between Sheepshead Bay to the west and Marine Park to the east. The area is served by Brooklyn Community Board 15. The population of the neighborhood is 4,797 as of the 2020 U.S. census.

Sheepshead Bay is a neighborhood in southern Brooklyn, New York City. It is bounded by Ocean Parkway to the west; Avenue T and Kings Highway to the north; Nostrand Avenue and Gerritsen Avenue to the east; and the Atlantic Ocean to the south. Sheepshead Bay is abutted by the neighborhoods of Brighton Beach and Homecrest to the west; Midwood to the north; and Gerritsen Beach to the east.