Châtelaudren (; ; Gallo: Le Chastèu) is a former commune in the Côtes-d'Armor department of Brittany in northwestern France. On 1 January 2019, it was merged into the new commune Châtelaudren-Plouagat.Arrêté préfectoral 28 September 2018 Inhabitants of Châtelaudren are called Châtelaudrinais in French.
See also Communes of the Côtes-d'Armor department
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