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 148,804 in 2021.
- Arrondissement of Mamers, (subprefecture: Mamers) with 191 communes. The population of the arrondissement was 149,694 in 2021.
- Arrondissement of Le Mans, (prefecture of the Sarthe department: Le Mans) with 45 communes. The population of the arrondissement was 267,560 in 2021.