Arthur Loomis Harmon

Arthur Loomis Harmon (1878 – 1958) was an American architect. He is most famous as the design partner of the firm Shreve, Lamb and Harmon.

With the firm he designed many landmarks that still stand today. Among them are: 740 Park Avenue, the Empire State Building, and 3 Park Avenue. He was educated at Columbia University's School of Architecture, and worked at the architectural firm of McKim, Mead & White. Later he partnered with Wallis & Goodwillie before joining Shreve and Lamb to form Shreve, Lamb & Harmon.

Personally he also designed several buildings of relative note, namely Jerusalem International YMCA, Ten-Eyck-Troughton Residence, and Warburton House. He died in 1958 in White Plains, New York

He was elected into the National Academy of Design as an Associate member in 1935 and became a full Academician in 1944.