Otto "Proc" Klum (October 17, 1892 – September 24, 1944) was an American football and basketball coach.
Klum is the most successful coach in Hawaii football history having compiled a career record of 84–51–7.
Klum was also the head basketball coach at Hawaii for two seasons from 1921 to 1923, tallying a mark of 13–8.
Klum died on September 24, 1944, of a heart attack near Ashland, Oregon.
[1] Klum Gym, on the University of Hawaii's Manoa campus, is named after the former coach.