The prime minister of Czechoslovakia was the head of government of Czechoslovakia, from the creation of the First Czechoslovak Republic in 1918 until the dissolution of the Czech and Slovak Federative Republic on 1 January 1993. During periods when the post of the president of Czechoslovakia was vacant, the prime minister took on most presidential duties. However, the Czechoslovak constitutions do not define anything like a post of acting president.

Prime ministers of Czechoslovakia (1918–1992)

{{legend||Czechoslovak National Democracy (ČSND)|border=1px solid #AAAAAA}} {{legend||Czechoslovak Social Democratic Party (ČSSD)|border=1px solid #AAAAAA}} {{legend||Republican Party of Farmers and Peasants (RSZML)|border=1px solid #AAAAAA}} {{legend||Party of National Unity (SNJ)|border=1px solid #AAAAAA}} {{legend||Communist Party of Czechoslovakia (KSČ)|border=1px solid #AAAAAA}} {{legend||Civic Democratic Union (ODÚ)|border=1px solid #AAAAAA}} {{legend||Civic Democratic Party (ODS)|border=1px solid #AAAAAA}} {{legend||Independent|border=1px solid #AAAAAA}}

Timeline