The Cotentin Peninsula (US: /ˌkoʊtɒ̃ˈtæ̃/, French: [kɔtɑ̃tɛ̃]; Norman: Cotentîn [kotɑ̃ˈtẽ] ), also known as the Cherbourg Peninsula, is a peninsula in Normandy that forms part of the northwest coast of France. It extends north-westward into the English Channel, towards Great Britain. To its west lie the Gulf of Saint-Malo and the Channel Islands, and to the southwest lies the peninsula of Brittany.
The peninsula lies wholly within the department of Manche, in the region of Normandy.