The 7 arrondissements of the Pas-de-Calais department are:[1]
- Arrondissement of Arras, (prefecture of the Pas-de-Calais department: Arras) with 357 communes. The population of the arrondissement was 249,961 in 2021.
- Arrondissement of Béthune, (subprefecture: Béthune) with 104 communes. The population of the arrondissement was 292,114 in 2021.
- Arrondissement of Boulogne-sur-Mer, (subprefecture: Boulogne-sur-Mer) with 74 communes. The population of the arrondissement was 157,817 in 2021.
- Arrondissement of Calais, (subprefecture: Calais) with 52 communes. The population of the arrondissement was 152,091 in 2021.
- Arrondissement of Lens, (subprefecture: Lens) with 50 communes. The population of the arrondissement was 369,427 in 2021.
- Arrondissement of Montreuil, (subprefecture: Montreuil) with 164 communes. The population of the arrondissement was 110,907 in 2021.
- Arrondissement of Saint-Omer, (subprefecture: Saint-Omer) with 89 communes. The population of the arrondissement was 129,124 in 2021.