The 2025–26 season marked the 119th in RC Lens's history, and their sixth consecutive campaign in Ligue 1, alongside participation in the Coupe de France. The club's crowning achievement came on 22 May 2026, when they won the Coupe de France for the first time ever, defeating Nice 3–1 in the final. This historic silverware was the highlight of an otherwise standard domestic league campaign, which saw one matchday (against Paris Saint-Germain) postponed due to PSG's commitments in the UEFA Champions League. The season's roster, including loan deals and transfers, as well as the management team, is officially documented for the period. Ultimately, the 2025–26 season will be remembered as a landmark year for the club, securing their first major trophy and breaking a long-standing drought.