Cannon & Fetzer was an American architectural firm that operated between 1909 and 1937 in Salt Lake City, Utah. Lewis T. Cannon and John Fetzer were the principal architects. A number of its works are listed on the U.S. National Register of Historic Places. For a brief time between 1910 and 1915, the firm was named Cannon, Fetzer & Hansen after partnering with Ramm Hansen. Many of their works survive and are listed on the U.S. National Register of Historic Places.