The 2020–21 RC Lens season is the club's 115th season in existence and the first season back in the top flight of French football. In addition to the domestic league, Lens will participate in this season's edition of the Coupe de France. The season covers the period from 1 July 2020 to 30 June 2021.
^ abSince the winners of the 2020–21 Coupe de France, Paris Saint-Germain, qualified for European competition based on league position, the Europa League group stage spot reserved for the cup winners was passed to the fifth-placed team, and the Europa Conference League play-off round spot was passed to the sixth-placed team.