2011–12 Algerian Ligue Professionnelle 1

The 2011–12 Algerian Ligue Professionnelle 1 was the 50th season of the Algerian Ligue Professionnelle 1 since its establishment in 1962. A total of 16 teams contested the league, with ASO Chlef as the defending champions. The league started on 6 September 2011, and ended on 22 May 2012.

While the league was originally scheduled to start on 10 September 2011, the official start date will be 6 September 2011, with a match between JS Kabylie and MC Alger. The tie was moved up due to the two club's participation in African competition.

Promotion and relegation
Teams promoted from 2010–11 Algerian Ligue Professionnelle 2
 * CS Constantine
 * NA Hussein Dey
 * CA Batna

Teams relegated to 2011-12 Algerian Ligue Professionnelle 2
 * USM Annaba
 * CA Bordj Bou Arréridj
 * USM Blida