Carroll Gardens is a neighborhood in the northwestern portion of the New York City borough of Brooklyn. Encompassing approximately 40 city blocks, it is bounded by Degraw and Warren Streets (north), Hoyt and Smith Streets (east), Ninth Street or the Gowanus Expressway (south), and Interstate 278, the Gowanus and Brooklyn–Queens Expressways (west). The neighborhoods that surround it are Cobble Hill to the northwest, Boerum Hill to the northeast, Gowanus to the east, Red Hook to the south and southwest, and the Columbia Street Waterfront District to the west.

Red Hook is a neighborhood in western Brooklyn, New York City, New York, within the area once known as South Brooklyn. It is located on a peninsula projecting into the Upper New York Bay and is bounded by the Gowanus Expressway and the Carroll Gardens neighborhood on the northeast, Gowanus Canal on the east, and the Upper New York Bay on the west and south. A prosperous shipping and port area in the early 20th century, the area declined in the latter part of the century. Today it is home to the Red Hook Houses, the largest housing project in Brooklyn.