La Roche-Jaudy is a commune in the Côtes-d'Armor department of Brittany in northwestern France. It was established on 1 January 2019 by the merger of the former communes of La Roche-Derrien, Hengoat,
The Côtes-d'Armor, formerly known as Côtes-du-Nord until 1990, is a department in the north of Brittany, in northwestern France. In 2023, it had a population of 611,859.
The departmental council and prefectural building in Saint-Brieuc.