Ajaccio (pronounced /əˈjɑːtʃoʊ/ in English; Latin: Adiacium; French: Ajaccio, [aʒaksjo]; Corsican: Aiacciu [aˈjattʃu]; Italian: Ajaccio, [aˈjattʃo]), is a commune in France. It is the capital of the region of Corsica and the prefecture of the department of Corse-du-Sud.

The geopolitical arrangements of the commune are slightly different from those typical of Corsica and France. Usually an arrondissement includes cantons and a canton includes one to several communes including the chef-lieu, "chief place", from which the canton takes its name. The city of Ajaccio is one commune, but it contains six cantons, Cantons 1-6, and a fraction of Canton 7. The latter contains five other communes: Bastelicaccia, Alata, Afa, Appietto and Villanova, making a total of six communes for the seven cantons of Ajaccio.