The 2021 Le Mans Cup, known as the 2021 Michelin Le Mans Cup under sponsorship, was the sixth season of the Le Mans Cup. It began on 17 April at the Circuit de Barcelona-Catalunya and ended on 25 October at the Algarve International Circuit. The series was open to Le Mans Prototypes in the LMP3 class, and grand tourer sports cars in the GT3 class.