One 57

formerly known as Carnegie 57, is a 75-story, 1,005-foot (306 m) supertall skyscraper at 157 West 57th Street between Sixth and Seventh Avenues in the Midtown neighborhood of Manhattan, New York City. The building has 92 condominium units on top of a new Park Hyatt Hotel with 210 rooms, the flagship Hyatt property.

The tower, developed by Extell Development Company and designed by Christian de Portzamparc, was the first ultra-luxury condominium tower along the stretch of 57th Street that was subsequently named Billionaires' Row. Upon completion in 2014, it was the tallest residential building in the city for a few months until the completion of 432 Park Avenue.