The canton of Ploërmel is an administrative division of the Morbihan department, northwestern France. Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Ploërmel.
It consists of the following communes:
Brignac Campénéac Concoret La Croix-Helléan Cruguel Évriguet Forges de Lanouée Gourhel La Grée-Saint-Laurent Guégon Guillac Guilliers Helléan Josselin Lantillac Loyat Mauron Ménéac Mohon Montertelot Néant-sur-Yvel Ploërmel Saint-Brieuc-de-Mauron Saint-Léry Saint-Malo-des-Trois-Fontaines Saint-Servant Taupont Tréhorenteuc La Trinité-Porhoët
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