Normandy is a geographical region of France corresponding to the former Duchy of Normandy. The continental territory covers 30,627 km² and forms the preponderant part of Normandy and roughly 5% of the territory of France. It is divided for administrative purposes into two regions: Lower Normandy and Upper Normandy. The Channel Islands (referred to as Îles Anglo-Normandes in French) are historically part of Normandy, cover 194 km² and comprise two bailiwicks: Guernsey and Jersey, which are British Crown Dependencies.
Upper Normandy (Haute-Normandie) consists of the French departments of Seine-Maritime and Eure, and Lower Normandy (Basse-Normandie) of the departments of Orne, Calvados, and Manche. The former province of Normandy comprised present-day Upper and Lower Normandy, as well as small areas now part of the départements of Eure-et-Loir, Mayenne, and Sarthe. The name of Normandy is derived from the settlement of the territory by Vikings ("Northmen") from the 9th century, and confirmed by treaty in the 10th century. For a century and a half following the Norman Conquest of England in 1066, Normandy and England were linked by Norman and Frankish rulers.