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.