Ligue 1 (Première division or Division 1 until 2003, now called Ligue 1 Orange) is the top division of French and Monegasque football, one of two divisions making up the LFP, the other being Ligue 2. It has been an all-professional league since its inception in 1932 except for the 1943-44 season, during which the Vichy regime abolished professionalism. Since the end of World War II, the French first division has switched several times between an 18- and a 20- team format, the latter being in force today and having the preference of clubs in spite of a busier schedule for the players.

The 20 Ligue 1 teams play each other twice (home and away) during the season for a 38-match schedule. At the end of the season, the bottom three teams in the division are relegated to Ligue 2, and are replaced by the top three teams of Ligue 2. This particular promotion and relegation format, in place since 1995, is a relative novelty in the French top flight. The traditional format has long been direct relegation of the bottom two teams and a play-off between the third-last first-division team and the winner of the second-division play-offs.

Currently, the top three teams in Ligue 1 qualify for the Champions League, with the top two proceeding directly to the group phase. The third-placed team enters in the final qualifying round. The fourth- and fifth-placed teams qualify for the UEFA Cup. The sixth- and seventh-placed teams can also qualify, depending on results in the two domestic cup competitions.