The name was used from 1 January 1969 to November 1989, when the previously unitary Czechoslovak state changed into a federation.

The former centralist state Czechoslovakia was divided in two parts: the Czech Socialist Republic and the Slovak Socialist Republic by the Constitutional Law of Federation of 28 October 1968, which went into effect on 1 January 1969.

After the Velvet Revolution which brought the end of socialism in Czechoslovakia, the word socialist was dropped from the names of the two republics.

c ČSR; included the autonomous regions of Slovakia and Subcarpathian Ruthenia.

e ČSR; declared a "people's democracy" (without a formal name change) under the Ninth-of-May Constitution following the 1948 coup.