Cobble Hill is a neighborhood in the northwestern portion of the New York City borough of Brooklyn. A small neighborhood comprising 40 blocks, Cobble Hill sits adjacent to Brooklyn Heights to the north, Boerum Hill to the east, Carroll Gardens to the south, and the Columbia Street Waterfront District to the west. It is bounded by Atlantic Avenue (north), Court Street (east), Degraw Street (south) and the Brooklyn Queens Expressway (west). Other sources add to the neighborhood a rectangle bounded by Wyckoff Street on the north, Hoyt Street on the east, Degraw Street on the south, and Court Street on the west.

Through its early history, the area now called "Cobble Hill" was considered to be part of South Brooklyn, Red Hook, or simply the Sixth Ward, or as part of Brooklyn Heights. The current name, a revival of a name which had died out by the 1880s, was adopted in 1959 Much of the neighborhood, which has "one of the city's finest collections of nineteenth-century houses", is included in the Cobble Hill Historic District.

Cobble Hill is part of Brooklyn Community District 6 and its ZIP Codes are 11201 and 11231. It is served by the 76th Precinct of the New York City Police Department at 191 Union Street.