740 Park Avenue is a luxury cooperative apartment building on the west side of Park Avenue between East 71st and 72nd Streets in the Lenox Hill neighborhood of Manhattan, New York City. It was described in Business Insider in 2011 as "a legendary address" that was "at one time considered (and still thought to be by some) the most luxurious and powerful residential building in New York City". The "pre-war" building's side entrance address is 71 East 71st Street.