Harry Aldrich Rabenhorst (April 30, 1898 – March 24, 1972) was an American football player, coach of football, basketball, and baseball, and college athletics administrator. A native of Baton Rouge, Louisiana, he served as the head basketball coach at Louisiana State University (LSU) from 1925 to 1942 and again from 1945 to 1957. Rabenhorst was also the head baseball coach at LSU from 1927 to 1942 and again from 1946 to 1946 as well as the school's athletic director from 1967 to 1968. His 1935 LSU basketball team won a national championship and his 1953 squad reached the Final Four.