Merlin Ammon Ditmer (April 9, 1886 – March 10, 1950) was an American football and basketball coach.
He served as the head football coach (1920–1926) and head men's basketball coach (1920–1925) at Otterbein University in Westerville, Ohio.
[1] Ditmer moved to Oxford, Ohio to work an assistant football and basketball coach at Miami University before serving as the school's athletic director from 1941 to 1948.
[2] # denotes interim head coach