111 West 57th Street, also known as Steinway Tower, is a supertall residential skyscraper in the Midtown Manhattan neighborhood of New York City, New York, U.S. Developed by JDS Development Group and Property Markets Group, it sits on Billionaires' Row on the north side of 57th Street near Sixth Avenue. The main portion of the building is an 84-story, 1,428-foot (435-meter) tower designed by SHoP Architects and completed in 2021. Preserved at the base is the 16-story Steinway Building (also Steinway Hall), a former Steinway & Sons store designed by Warren and Wetmore and completed in 1925, which originally carried the address 111 West 57th Street.
111 West 57th Street contains 59 luxury condominiums: 14 in Steinway Hall and 45 in the tower. The residential tower has a glass facade with piers made of terracotta; its pinnacle contains setbacks on the southern side. The tower is the fourth-tallest building in the United States as of November 2022, as well as the thinnest skyscraper in the world with a width-to-height ratio of about 1:24. Steinway Hall is a New York City designated landmark and has a facade made mostly of brick, limestone, and terracotta. 111 West 57th Street contains numerous resident amenities, housed mostly in the building's base, as well as a large rotunda within Steinway Hall that is also a designated city landmark.