Côtes-d'Armor

The Côtes-d'Armor ( , ; French pronunciation:; Gallo: Côtes d'Ahaot, Breton: Aodoù-an-Arvor, ), formerly known as Côtes-du-Nord until 1990 (Breton: Aodoù-an-Hanternoz, ), is a department in the north of Brittany, in northwestern France. In 2023, it had a population of 611,859.