Clarence Z. Hubbell (August 13, 1869 - 1953) was an American architect. Born in Illinois and educated at the Art Institute of Chicago, he settled in Spokane, Washington in 1900. With John K. Dow, he designed the NRHP-listed Hutton Building. They also designed Van Doren Hall and the Veterinary Science Building on the campus of Washington State University in Pullman, Washington.