The 4 arrondissements of the Oise department are:[1]
- Arrondissement of Beauvais, (prefecture of the Oise department: Beauvais) with 245 communes.[2] The population of the arrondissement was 229,183 in 2016.
- Arrondissement of Clermont, (subprefecture: Clermont) with 146 communes. The population of the arrondissement was 130,333 in 2016.
- Arrondissement of Compiègne, (subprefecture: Compiègne) with 156 communes. The population of the arrondissement was 182,266 in 2016.
- Arrondissement of Senlis, (subprefecture: Senlis) with 132 communes.[3] The population of the arrondissement was 281,760 in 2016.