The 3 arrondissements of the Loire department are:[1]
- Arrondissement of Montbrison, (subprefecture: Montbrison) with 135 communes.[2] The population of the arrondissement was 181,551 in 2016.
- Arrondissement of Roanne, (subprefecture: Roanne) with 113 communes.[3] The population of the arrondissement was 157,160 in 2016.
- Arrondissement of Saint-Étienne, (prefecture of the Loire department: Saint-Étienne) with 75 communes.[4] The population of the arrondissement was 423,286 in 2016.