Leonhard Merzin; 10 February 1934 in Aruküla, Kudina Parish – 2 January 1990 in Tartu) was an Estonian theatre and film actor, one of the Estonian actors active in the Soviet Union and abroad. He played in more than 50 films. His most notable role in Estonia is "Teacher Laur" in Spring and as Edgar in Soviet Union adaption of King Lear.