The 2005 Division 1 season was the 40th of the competition of the first-tier football in Senegal.

The tournament was organized by the Senegalese Football Federation.

ASC Port Autonome won the third and their recent title.

Port Autonome along with Diaraf would compete in the 2006 CAF Champions League the following season.

The league was contested by 18 teams with ASC Port Autonome again winning the championship.