Leonhard Merzin (10 February 1934 in Aruküla, Kudina Parish (now Maardla, Mustvee Parish) – 2 January 1990 in Tartu^[1]) 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.^[1] His most notable role in Estonia is "Teacher Laur" in Spring (Kevade) and as Edgar in Soviet Union adaption of King Lear (Korol Lir).^[1]

From 1952 to 1954 Merzin studied at the Tartu Art School and in 1969 he graduated from the Viljandi School of Cultural Education.

Merzin also tried hand as a painter, mostly depicting nature and flowers.

He is buried at the Raadi cemetery in Tartu.