Francis Conroy Sullivan (July 2, 1882 – April 4, 1929) was a Canadian architect.
The only Canadian pupil of Frank Lloyd Wright aside from Roger d'Astous, Sullivan worked in the Oak Park studio in 1907 but returned to Ottawa in 1908.
He was an architect for the Canadian Department of Public Works from 1908 to 1911, after which he had an independent practice in Ottawa until 1916.
For example, whereas horizontals predominate in Wright's creations, Sullivan used strong verticals to create tension in his designs.
Sullivan went to Chandler, Arizona while in Wright's employ, and died there on April 4, 1929.