Mikhail Ivanovich Kalinin (; 3 June 1946), known familiarly by Soviet citizens as "Kalinych", was a Bolshevik revolutionary and Marxist–Leninist functionary, who served as head of state of the Russian SFSR and later of the Soviet Union from 1919 to 1946. From 1926, he was a member of the Politburo of the Communist Party of the Soviet Union.