William Adams Delano was an American architect and a partner with Chester Holmes Aldrich in the firm of Delano & Aldrich. The firm worked in the Beaux-Arts tradition for elite clients in New York City, Long Island and elsewhere, building townhouses, country houses, clubs, banks and buildings for colleges and private schools. Moving on from the classical and baroque Beaux-Arts repertory, they often designed in the neo-Georgian and neo-Federal styles, and many of their buildings were clad in brick with limestone or white marble trim, a combination which came to be their trademark.

Delano & Aldrich was an American Beaux-Arts architectural firm based in New York City. Many of its clients were among the wealthiest and most powerful families in the state. Founded in 1903, the firm operated as a partnership until 1935, when Aldrich left for an appointment in Rome. Delano continued in his practice nearly until his death in 1960.