The 2023 Nationale 1 season was the 56th season of the Nationale 1 (NM1), the top-tier basketball league in Senegal. The season began on 21 January and ended on 17 September 2023.
AS Douanes won its record-setting 11th national title, after defeating Jeanne d'Arc in the finals, overtaking the record that was jointly held with ASFA. The Douanes' forward Samba Daly Fall was named both MVP and Finals MVP of the season.
In the play-down round, all eight teams played each other team once. ASFA and UCAD, as the 7th- and 8th-ranked teams, were relegated to the Division 2.