The 2019–20 Algerian Ligue Professionnelle 1 was the 58th season of the Algerian Ligue Professionnelle 1 since its establishment in 1962. A total of 16 teams contested the league. The Ligue Professionnelle 1 kicked off on August 15, 2019, this time without an official sponsorship for the first time since 2008–09, Mobilis ATM did nothing to renew the contract. On September 17, at the Extraordinary General Assembly of Algerian Football Federation, it unanimously endorses the change of the competition system by increasing the number of clubs from 16 to 18, as for the second division to 32 clubs from two groups Central East and Central West from 16 clubs also became the number of professional clubs 18 instead of 32 starting from the season 2020–21. On September 30, at the monthly statutory meeting held in Ouargla. After debate and exchanges between the members, the Federal Office opted for the variant favoring the relegation of two clubs of the Ligue Professionnelle 1 and the promotion of four clubs of the League 2 to the upper tier.