1998–99 Algerian Championnat National

The 1998–99 Algerian Championnat National was the 37th season of the Algerian Championnat National since its establishment in 1962. A total of 28 teams contested the league, with USM El Harrach as the defending champions, The Championnat started on September 10, 1998. and ended on May 31, 1999.

Promotion and relegation
Teams promoted from Algerian Division 2 1998-1999
 * No Promotion

Teams relegated to Algerian Division 2 1999-2000
 * ES Mostaganem
 * JSM Tiaret
 * GC Mascara
 * RC Kouba
 * ASM Oran
 * CS Constantine
 * AS Aïn M'lila
 * USM El Harrach
 * NA Hussein Dey
 * JSM Tébessa

Teams relegated to Algerian Division 3 1999-2000
 * US Chaouia
 * CA Bordj Bou Arreridj
 * E Sour El Ghozlane
 * SA Mohammadia
 * WA Boufarik
 * IRB Hadjout