Arrondissements of the Côtes-d'Armor department

The four arrondissements of the Côtes-d'Armor department are:[1] In 1800, the arrondissements of Saint-Brieuc, Dinan, Guingamp, Lannion and Loudéac were established.

The arrondissement of Loudéac was disbanded in 1926.

[2] The borders of the arrondissements of Côtes-d'Armor were modified in January 2017:[3]