William Harmon Hollinger (April 27, 1921 – April 9, 2011) was an American football, basketball, and track and field coach and college athletics administrator. He served as the head basketball coach at Ripon College in Ripon, Wisconsin from 1950 to 1956. He returned to his alma mater, Hiram College in Hiram, Ohio, in 1956 and served as the head football coach (1956–1958) and head basketball coach (1956–1988). Hollinger was inducted into the National Association of Collegiate Directors of Athletics Hall of Fame for his tenure as the athletic director at Hiram.