Ralph Ginn (July 23, 1907 – May 26, 1972) was an American football and basketball player and coach. He served as the head football coach at Tarkio College in Tarkio, Missouri from 1941 to 1942 and South Dakota State University from 1947 to 1968, compiling a career college football coaching record of 115–101–10. Ginn was also the head basketball coach at Wayne State College in Wayne, Nebraska from 1942 to 1944 tallying a mark of 18–9. Ginn died on May 26, 1972, at St. Mary's Hospital in Pierre, South Dakota.