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.
The 2021 calendar was unveiled on 19 October 2020.
All cars in the LMP3 class used the Nissan VK56DE 5.6L V8 engine and Michelin tyres.
Bold indicates the overall winner.
Points are awarded according to the following structure: