Bergen Beach is a residential neighborhood in the borough of Brooklyn, New York City. It is located on a peninsula abutting Jamaica Bay in the southeastern portion of the borough, and is bordered by Mill Basin and the neighborhood of the same name to the south and west; the neighborhood of Flatlands to the northwest; Paerdegat Basin and the neighborhood of Canarsie to the northeast; and Jamaica Bay and the Belt Parkway to the east. Bergen Beach contains a sub-neighborhood named Georgetown. The vast majority of residents are white, and the neighborhood generally has a suburban quality.

Mill Basin is a residential neighborhood in southeastern Brooklyn, New York City. It is on a peninsula abutting Jamaica Bay and is bordered by Avenue U on the northwest and the Mill Basin/Mill Island Inlet on its remaining sides. Mill Basin is adjacent to the neighborhood of Bergen Beach to the northeast, Flatlands to the northwest, Marine Park to the southwest, and Floyd Bennett Field and the former Barren Island to the southeast. Mill Basin also contains a subsection called Old Mill Basin, north of Avenue U.