The Ansonia is a condominium building at 2109 Broadway, between 73rd and 74th Streets, on the Upper West Side of Manhattan in New York City. The 17-story structure was designed by French architect Paul Emile Duboy in the Beaux-Arts style. It was built between 1899 and 1903 as a residential hotel by William Earle Dodge Stokes, who named it after his grandfather, the industrialist Anson Greene Phelps.