The Algerian Ligue Professionnelle 1 (Arabic: الرابطة الجزائرية المحترفة الأولى لكرة القدم); known as Championnat National de Première Division or Ligue 1 for short, and formerly known as the Championnat National 1, is the Algerian professional league for association football clubs. It is the country's primary football competition and serves as the top division of the Algerian football league system. Ligue 1 is one of two divisions making up the Ligue de Football Professionnel, the other being Ligue Professionnelle 2. The league is contested by 16 clubs, and it operates on a system of promotion and relegation with Ligue 2. In 2009 it was known as Championnat d'Algérie D1 Nedjma and from 2010 to 2014, it was known as Ligue Professionnelle 1 Nedjma as it is sponsored by Kuwaiti telecommunications company Nedjma. From 2014, the league is officially known as Ligue Professionnelle 1 Mobilis as it is sponsored by Algerian telecommunications company Mobilis.
The league was created in 1962, when Algeria became an independent nation. Until 1950, only regional leagues (Algiers, Constantine, Oran) were contested. Some 'national' playoffs were played in the first decade of the 20th century, first in 1904. Between 1920 and 1956 the winners played off for the North African Championship, together with league winners from Morocco and Tunisia.
Between 1957 and 1962 a North African Championship without participation from Morocco and Tunisia (who had gained independence) was organised as "Algerian championship".
On August 21, 2010, the FAF announced that the name of the league would change to Ligue Professionnelle 1 to reflect the professionalization of the league.
On 15 December 2011, three clubs from the league were sanctioned by the Ligue de Football Professionnel (LFP) for not responding to their set deadline (7 December 2011) in solving the disputes between their players. The following clubs were banned from recruiting any player during the winter transfer window: MC Oran, CS Constantine, and AS Khroub. The clubs were also informed that, if the disputes are not resolved within a period of one month they would further be sanctioned with a deduction of points.