Cotes d'Armor

Côtes-d'Armor
Department
Prefecture building of the Côtes-d'Armor department, in Saint-Brieuc
Flag Coat of arms
Location of Côtes-d'Armor in France
Coordinates: 48°20′N 02°50′E / 48.333°N 2.833°E / 48.333; 2.833Coordinates: 48°20′N 02°50′E / 48.333°N 2.833°E / 48.333; 2.833
Country	France
Region	Brittany
Prefecture	Saint-Brieuc
Subprefectures	Dinan Guingamp Lannion
Government
• President of the General Council	Claudy Lebreton (PS)
Area
• Total	6,878 km2 (2,656 sq mi)
Population (2013)
• Total	597,085
• Rank	43rd
• Density	87/km2 (220/sq mi)
Time zone	CET (UTC+1)
• Summer (DST)	CEST (UTC+2)
Department number	22
Arrondissements	4
Cantons	27
Communes	356
^1 French Land Register data, which exclude estuaries, and lakes, ponds, and glaciers larger than 1 km2

Côtes-d'Armor (French pronunciation: ​[kot.daʁ.mɔʁ]; Breton: Aodoù-an-Arvor), formerly named Côtes-du-Nord, is a department in the north of Brittany, in northwestern France.

Côtes-du-Nord was one of the original 83 departments created during the French Revolution on 4 March 1790. It was created from part of the former province of Brittany. Its name was changed in 1990 to Côtes-d'Armor (ar mor meaning "the sea" in Breton and Côtes meaning "coast" in French). The name also has a historical connotation recalling the Roman province of Armorica.

The present department corresponds to most of historical Trégor, part of Cornouaille, and most of Saint-Brieuc.

Côtes-d'Armor is part of the current administrative region of Brittany and is surrounded by the departments of Finistère, Morbihan, and Ille-et-Vilaine, with the English Channel to the north.

The inhabitants of the department are called Costarmoricains.

The Côtes-d'Armor has usually been a left-wing holdout in a historically strongly clerical and right-wing Brittany, due to the department's more anti-clerical nature, especially in the inland area around Guingamp, a former Communist stronghold.