Niilo Rudolf Tammisalo (originally Ekbom; 15 October 1894, Helsinki - 5 February 1982, Helsinki) was an influential figure in Finnish sports in the first half of the 20th century. He was a versatile athlete who represented Finland as a player with the national teams in football, ice hockey, and bandy; he was also on Finnish Champion teams in each of the three sports with domestic clubs. When his career as a player came to a close in the early 1930s, he dedicated himself to coaching, refereeing, teaching, and administrating sports organizations.