Oto Yanovich Grigalka (Russian: Отто Янович Григалка; 28 June 1925 – 8 February 1993) was a Latvian track and field athlete who competed in the shot put and discus throw.

[4] At national level he was a seven-time winner at the Soviet Athletics Championships, taking three straight shot put titles from 1952 to 1954 and going undefeated in the discus throw from 1953 to 1956.

During his career he was a member of the Dynamo Moscow sports club and was trained by Leonīds Mitropoļskis.

He was highly ranked in the discus throw during the latter part of his career, placing third on the world seasonal lists for the event in 1955 and 1958.

He married a fellow Soviet track athlete, Mariya Pisareva who won an Olympic high jump medal.