Enoch Josiah "Joe" Mills (July 23, 1880 – October 3, 1935) was an American football, basketball, and baseball coach, college athletics administrator, author, naturalist, and hotelier. He served as the head football coach at Fort Worth University from 1904 to 1906, Baylor University from 1908 to 1909, and the University of Colorado Boulder from 1918 to 1919.