Guerlédan is a commune in the department of Côtes-d'Armor, western France. The municipality was established on 1 January 2017 by mer…Guerlédan is a commune in the department of Côtes-d'Armor, western France. The municipality was established on 1 January 2017 by merger of the former communes of Mûr-de-Bretagne and Saint-Guen. This commune chose its name in reference to the Lake Guerlédan which is on its territory.