2017–18 Tunisian Ligue Professionnelle 1

The 2017–18 Tunisian Ligue Professionnelle 1 (Tunisian Professional League) season was the 92nd season of top-tier football in Tunisia. The season calendar was drawn on July 24. The competition started on August 15.

Teams
A total of 14 teams contested the league, including 11 sides from the 2016–17 season and three promoted from the 2016–17 Ligue 2. Union Monastirienne and Stade Tunisien obtained promotion after winning their penultimate game of the season, while Olympique Médenine won the promotion playoff against Avenir de Marsa. The three teams replaced the five teams that were relegated to 2017–18 Tunisian Ligue 2 in order to reduce the number of teams from 16 to 14.