Îles Saint-Marcouf are a group of two small uninhabited islands off the coast of Normandy, France. They lie in the Baie de la Seine region of the English Channel and are 6.5 kilometres (4.0 mi) east of the coast of the Cotentin peninsula at Ravenoville and 13 kilometres (8.1 mi) from the island of Tatihou and the harbour at Saint-Vaast-la-Hougue.