Côtes-d'Armor lies on the Northern coast of Brittany, it has a beautiful rugged coastline with steep cliffs and is dotted with quaint, medieval towns. Côtes-d'Armor 22 is part of the current administrative region of Bretagne and is surrounded by the departments of Finistère, Morbihan, and Ille-et-Vilaine, with the English Channel on the north. The residents of the department are called Costarmoricains. The western fraction of the department is part of the traditionally Breton-speaking. Côtes d'Armor consists of an undulating plateau with three ranges of hills in the south. Bréhat and other small islands lie off the steep, rocky coast.

Côtes d'Armor is Maritime department in the Brittany region of France, formerly known as Côtes-du-Nord. Wheat, oats, flax, potatoes, apples, and plums are grown; the département is the nation's leading producer of pork and poultry; and there is horse breeding. Lime, Slate, and china clay are originated, and there are flour mills, tanneries, ironworks, and shipyards. The fishing trade is of great importance; scallions are caught in St-Brieuc bay. The governmental midpoint of Côtes d'Armor is St-Brieuc. On top of the high lands the soil is poor, but along the coast it has been improved over many centuries using seaweed and sand.