The 2017–18 Championnat National 2 was the 20th season of the fourth tier in the French football league system in its current format.
Le Mans, Villefranche and Marignane-Gignac are promoted to 2018–19 Championnat National.
Paulhan-Pézenas, Raon-l'Étape, Beauvais, Fontenay, Rennes (res), Tarbes, Viry-Châtillon, Montceau, St-Louis Neuweg and AC Amiens were relegated to 2018–19 Championnat National 3 once the reprieves in the next section were taken into account.
[16] Paulhan-Pézenas and Viry-Châtillon were given additional administrative relegations by the FFF, subject to appeal, on 11 June 2018, meaning neither will contest Championnat National 3 next season.
On 17 October 2017 the FFF announced that due to SC Bastia not participating in the division as planned, the best 14th placed team will automatically be reprieved from relegation.