Johannes Türn (27 May 1899, in Tartu – 8 March 1993, in Tallinn) was an Estonian chess player.
In August/September 1936, he played on fourth board in the unofficial Chess Olympiad in Munich (+8 –4 =7).
In August/September 1939, he played as first reserve at the 8th Chess Olympiad in Buenos Aires (+3 –3 =4), as the Estonian team won the bronze medal.
[1] During World War II, Türn played in the Estonian championships, although the country was occupied by either the Soviet Union or Germany.
In 1941, he tied for 1st with Feliks Kibbermann in Tallinn (11th EST-ch), but took the title after a play-off match (+3 –0 =1).