The Czech Republic – 1. Liga, known as the Fortuna Liga for sponsorship reasons, is a Czech professional football league. At the top of the Czech football league system, it is the country’s primary football competition. 18 clubs contest the league In 2020–21 season. Operating a system of promotion and relegation with the Czech National Football League, the teams playing 34 games each. After the 2019–20 season, the league ranked 15th in Europe in the UEFA league rankings.

The history of the Czech football league began at the end of the 20th century. It reorganized for the 1993–1994 season, after the dissolution of former Czechoslovakia and therefore of the Czechoslovak League. Having won 12 league titles, Sparta Prague is the most successful team in the Czech Republic – 1 history. Other clubs who have won the title are Slavia Prague, Slovan Liberec, Baník Ostrava, and Viktoria Plzeň.