Georgius Young Cannon (March 6, 1892 – March 29, 1987) was a 20th-century architect in the American West who operated principally out of Salt Lake City, Utah. Cannon trained at the Massachusetts Institute of Technology (MIT), graduating in 1918. He then joined the army and later returned to Utah to intern with the architectural firm Ware & Treganza and Cannon & Fetzer. He served two missions to Germany for The Church of Jesus Christ of Latter-day Saints (LDS Church).
For a time, Cannon moved to Los Angeles and worked as the office manager of his MIT schoolmate Wallace Neff. He later returned to Utah and designed numerous buildings, mostly residences, and some of which remain on the National Register of Historic Places. Among his works were meetinghouses of the LDS Church and other civic buildings. Cannon served on a church-appointed board of six architects that oversaw the construction of the Idaho Falls Idaho Temple.
Cannon was the youngest of 32 children born to LDS Church leader George Q. Cannon. His mother, Caroline Young Cannon, was a daughter of Brigham Young. He was the half-brother to another architect, Lewis T. Cannon. Georgius was orphaned at age 11. He married Phyllis Winder and they had a daughter born in 1930, Dorothy Winder Cannon Webb (Allen Paul Webb). Grandchildren - Douglas Cannon Webb, Terrill Phyllis Webb Helander, Lawrence Scott Webb.