Czechoslovak

Czechoslovak may refer to:
 * A demonym or adjective pertaining to Czechoslovakia (1918–93)
 * First Czechoslovak Republic (1918–38)
 * Second Czechoslovak Republic (1938–39)
 * Third Czechoslovak Republic (1948–60)
 * Fourth Czechoslovak Republic (1960–89)
 * Fifth Czechoslovak Republic (1989–93)
 * Czechoslovak, also Czecho-Slovak, any grouping of the Czech and Slovak ethnicities:
 * As a national identity, see Czechoslovakism
 * The title of Symphony no. 8 in G Major op. 88 by Antonín Dvořák in 1889/90
 * The Czech–Slovak languages, a West Slavic dialect continuum
 * The Czechoslovak language, a theoretical standardized form defined as the state language of Czechoslovakia in its Constitution of 1920
 * Comparison of Czech and Slovak