The defending champions from the previous season were Espérance de Tunis.
A total of 16 teams contested the league, including 13 sides from the 2013–14 season and three promoted from the 2013–14 Tunisian Ligue Professionnelle 2.
The three teams made their comeback to the Tunisian Ligue Professionnelle 1 after finishing in the 3 first places of the six-team promotion group.
On the other hand, Olympique Béja, Palme de Tozeur and Grombalia Sports were the 3 last teams of the 2013–14 season and played in the Tunisian Ligue Professionnelle 2 during the 2014–15 season.
It was the highest average home attendance in the Tunisian top-flight football league, followed by ES Tunis with 7,278.