The 2018–19 Championnat National season was the 21st season since the establishment of the Championnat National, which serves as the third division of the French football league system.
Promoted from National 2 Relegated from Ligue 2
Relegated to National 2 Promoted to Ligue 2
A promotion play-off was held at the end of the season between the 18th-placed Ligue 2 team and 3rd-placed team of the 2018–19 Championnat National.
[2] Le Mans won 3–2 on aggregate and were promoted to Ligue 2, while Gazélec Ajaccio were relegated to the Championnat National.