Regional elections were held in France on 20 June and 27 June 2021. At stake were the regional councils in metropolitan and overseas France including the Corsican Assembly, Assembly of French Guiana and Assembly of Martinique, all for a six-year term. The Departmental Council of Mayotte, which also exercises the powers of a region, also participated in this election, because the departmental elections were held at the same time. Eighteen regional presidencies were at stake, with thirteen in mainland France and Corsica, as well as five overseas. Though they do not have legislative autonomy, these territorial collectivities manage sizable budgets. Moreover, regional elections are often perceived as a mid-term opinion poll. Due to the COVID-19 pandemic, the regional and departmental elections were postponed, first to 13 and 20 June 2021 and then to 20 and 27 June 2021.

The Corsican Assembly or Assembly of Corsica is the unicameral legislative body of the territorial collectivity of Corsica. It has its seat at the Grand Hôtel d'Ajaccio et Continental, in the Corsican capital of Ajaccio. After the 2017 territorial elections, the assembly was expanded from 51 to 63 seats, with the executive council expanding from 9 to 11 members.