The Waldorf Astoria New York is a luxury hotel and condominium residence in the Midtown Manhattan neighborhood of New York City, New York. The structure, at 301 Park Avenue between 49th and 50th Streets, is a 47-story, 625 ft (191 m) Art Deco landmark designed by architects Schultze and Weaver and completed in 1931. The building was the world's tallest hotel until 1957, when it was surpassed by Moscow's Hotel Ukraina. An icon of glamor and luxury, the Waldorf Astoria is one of the world's most prestigious and best-known hotels. Both the exterior and the interior of the Waldorf Astoria are designated by the New York City Landmarks Preservation Commission as official landmarks.

The original Waldorf-Astoria, built in two stages in the 1890s, was demolished in 1929 to make way for the construction of the Empire State Building. Conrad Hilton acquired management rights to the hotel in October 1949, and the Hilton Hotels Corporation bought the hotel outright in 1972. It underwent a $150 million renovation by Lee Jablin in the 1980s and early 1990s. In 2009, the Waldorf Astoria and Towers had 1,416 rooms; the most expensive room, the Presidential Suite, was designed with Georgian-style furniture to emulate that of the White House.

The Anbang Insurance Group of China purchased the Waldorf Astoria New York for $1.95 billion in 2014, making it the most expensive hotel ever sold. Anbang closed the entire building in March 2017 for extensive renovations, converting the upper stories into 375 condominiums and retaining 375 hotel rooms on the lowest 18 floors. Dajia Insurance Group took over the Waldorf Astoria when Anbang went bankrupt in 2020, and, after several delays, the hotel reopened in July 2025. The hotel has three restaurants: Peacock Alley, Lex Yard and Yoshoku.

The Waldorf Astoria has been known for its lavish dinner parties and galas, often at the center of political and business conferences and fundraising schemes involving the rich and famous. After World War II, it played a significant role in world politics and the Cold War, culminating in the controversial World Peace Conference of March 1949. The Presidential Suite was the residence of Herbert Hoover after his wife died for 20 years, and Frank Sinatra kept a suite at the Waldorf from 1979 until 1988. Some of the luxury suites were named after celebrities who lived or stayed in them, including Cole Porter, the Duke and Duchess of Windsor, Douglas MacArthur, and Winston Churchill.