Plumieux (French pronunciation: [plymjø]; Breton: Pluvaeg; Gallo: Ploemioec) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

On 1 January 2025, the former commune of Le Cambout and Coëtlogon were merged into Plumieux.

[3] Inhabitants of Plumieux are called plumetais and plumetaise in French.

As of 2020 municipal election, the Conseil Municipal de Plumieux is composed of 15 elected members, including the mayor.

The communes representation on the conseil communautaire of Loudéac Communauté - Bretagne Centre also consists of one elected member.