Antonín Zápotocký was a Czech communist politician and statesman who served as Prime Minister of Czechoslovakia from 1948 to 1953 and President of Czechoslovakia from 1953 to 1957.
He was born in Zákolany, Kladno District, Bohemia. His father was Ladislav Zápotocký, one of the founders of the Czech Social Democratic Party, together with Josef Boleslav Pecka-Strahovský and Josef Hybeš.
He was a delegate of the Left Wing of the ČSSD to the Second Comintern Congress, held in Petersburg, 19 July – 7 August 1920. Together with Bohumír Šmeral, he co-founded the Communist Party of Czechoslovakia when it broke away from the ČSSD in 1921. He was General Secretary of the KSČ from 1922 to 1925. In 1940, he was sent to Sachsenhausen concentration camp. He was released in 1945.
From 18 June to 18 July 1946 he was Chairman of the Constituent National Assembly.
Zápotocký became Prime Minister on 15 June 1948, replacing Klement Gottwald, who became president. On 14 March 1953, shortly after his return from Joseph Stalin's funeral, Gottwald died. As per the Ninth-of-May Constitution, Zápotocký took over most presidential duties until he was elected president in his own right a week later.