Brooklyn Heights is a residential neighborhood within the New York City borough of Brooklyn. The neighborhood is bounded by Old Fulton Street near the Brooklyn Bridge on the north, Cadman Plaza West on the east, Atlantic Avenue on the south, and the Brooklyn–Queens Expressway or the East River on the west. Adjacent neighborhoods are Dumbo to the north, Downtown Brooklyn to the east, and Cobble Hill and Boerum Hill to the south.

Brooklyn is a borough of New York City. Located on the westernmost end of Long Island, it is coextensive with Kings County in the U.S. state of New York. With 2,736,074 residents as of the 2020 United States census, Kings County is the most populous of the five boroughs of New York City and the most populous county in the State of New York. The population density of Brooklyn was 37,339.9 inhabitants per square mile (14,417.0/km2) in 2022, making it the second-most-densely-populated county in the United States, behind Manhattan, and it had the ninth-highest population of any county nationwide. Were Brooklyn still an independent city, it would be the fourth most populous in the U.S. after the rest of New York City, Los Angeles, and Chicago.