The Czechoslovakia national under-21 football team was the national football team for the under-21s of Czechoslovakia, before the country split into the Czech Republic and Slovakia (For information about the national teams of the two countries, see the articles Czech Republic national under-21 football team and Slovakia national under-21 football team.)
Following the realignment of UEFA's youth competitions in 1976, Czechoslovakia's Under-21 team was formed. Despite the end of the country in January 1993, the team played until March 1994, fulfilling its fixtures in the UEFA U-21 Championship as a combined team. Since the under-21 competition rules state that players must be 21 or under at the start of a two-year competition, technically it is an U-23 competition. Czechoslovakia's record for the preceding U-23 competitions is also shown.
In its twelve U-23 and U-21 competitions, the team had a decent record, winning the first competition in 1972 and reaching the quarter-finals on seven occasions. The team failed to qualify for the final eight on four occasions.
Czechoslovakia were randomly chosen to play holders Bulgaria for the title, which they did not win. The competition was abandoned in summer 1970 for a larger competition, Czechoslovakia's next competitive match was in qualification for that competition, which ended in 1972 with them as champions.