The 3 arrondissements of the Sarthe department are:[1]
- Arrondissement of La Flèche, (subprefecture: La Flèche) with 118 communes. The population of the arrondissement was 152,008 in 2016.
- Arrondissement of Mamers, (subprefecture: Mamers) with 191 communes.[2] The population of the arrondissement was 150,238 in 2016.
- Arrondissement of Le Mans, (prefecture of the Sarthe department: Le Mans) with 45 communes.[3] The population of the arrondissement was 265,315 in 2016.