The 4 arrondissements of the Ille-et-Vilaine department are:[1]
- Arrondissement of Fougères-Vitré, (subprefecture: Fougères) with 106 communes.[2] The population of the arrondissement was 184,039 in 2016.
- Arrondissement of Redon, (subprefecture: Redon) with 50 communes. The population of the arrondissement was 102,157 in 2016.
- Arrondissement of Rennes, (prefecture of the Ille-et-Vilaine department: Rennes) with 109 communes.[3] The population of the arrondissement was 599,717 in 2016.
- Arrondissement of Saint-Malo, (subprefecture: Saint-Malo) with 68 communes.[4] The population of the arrondissement was 165,866 in 2016.