Ivan Ignatyevich Yakubovsky (Russian: Ива́н Игна́тьевич Якубо́вский; 7 January 1912– 30 November 1976) was a Marshal of the Soviet Union, twice made a Hero of the Soviet Union and serving as commander-in-chief of the Warsaw Pact from 1967 to 1976.
Born as the sixth child of a peasant family in Belarus, he was employed in their village and graduated from a rural school. From 1930 he worked as section-secretary on the Makaryevsky village council, then at a plant. He graduated from two courses at the Orsha School in 1932.
Enlisting in the Red Army in 1932, he graduated from the Mikhail Kalinin Belarusian Association Military School in Minsk in 1934, aiming to serve as a training platoon commander in the 27th Omsk Red Banner Rifle Division (Vitebsk).
In 1935 he graduated from training courses in Leningrad, before serving in the Belorussian Military District as a platoon commander, company commander, battalion chief of staff and training battalion commander of various armoured units. Commanding a tank company in the Red Army's September 1939 Polish campaign as part of the troops on the Belorussian front, he also served in the 1939-40 Winter War.