Leo Lang (21 October 1919 – 25 January 2005) was a Croatian athletics coach and sports worker. Lang entered athletics in 1939 as a long-distance runner for HAŠK. After World War II he worked as a coach in Akademičar and Dinamo athletic clubs. Lang coached the Yugoslav national athletics team, as well as individual athletes such as , Franjo Škrinjar, and, most notably, European 800 meters champion and world record holder Vera Nikolić. He also advised Kenyan and Ethiopian long-distance runners, among them Mamo Wolde and Kipchoge Keino.