Czechoslovakia (Czech and Slovak: Československo) or Czecho-Slovakia (Czech and Slovak: Česko-Slovensko) was a country in Central Europe which existed from 1918 to 1939, and again from 1945 to 1992. See:
- The (First) Czechoslovak Republic (1918–1938)
- The (Second) Czechoslovak Republic (1938–1939)
- The (Third) Czechoslovak Republic (1945–1948)
- The Czechoslovak Socialist Republic (1948–1990), known from 1948 to 1960 as the (Fourth) Czechoslovak Republic
- The Czech and Slovak Federative Republic (1990–1992), sometimes referred to as the Fifth Czechoslovak Republic