At the time of the 1999 census the city of Cherbourg had an area of 6.91 square kilometres (2.668 sq mi), while the city of Octeville had an area of 7.35 km to the east and Cap de La Hague to the west, Cherbourg-Octeville is 120 km (75 mi) from the English coast.
Cherbourg and Octeville-sur-Cherbourg once belonged to the deanery of La Hague, delimited by the Divette.
Departing from Cherbourg, the D650 takes a southwesterly direction to Les Pieux and then along to join the Côte des Isles (the Channel Islands coast) to Barneville-Carteret.
In the approach to Cherbourg, this road has undergone development, in recent years, with amenities (roundabouts, traffic lights, urban development) by virtue of the peri-urbanisation of the communes in its path.
Historically, Cherbourg-en-Cotentin is at the western end of Route nationale 13, which runs through the city by the "Rouges Terres" and the Avenue de Paris, from La Glacerie.Similarly, upgrading to a dual carriageway for access of Maupertus Airport is envisaged.The D650 is used to connect Cherbourg to the west coast of the Cotentin peninsula.making it the first city of the department before the Saint-Lô prefecture and the second in the region after Caen.Cherbourg-en-Cotentin is protected by Cherbourg Harbour, between La Hague and Val de Saire, and the city has been a strategic position over the centuries, disputed between the English and French.
The greenschist, whose colour comes from chlorite and sericite, are used mainly for roofing in Nord-Cotentin, but also masonry in Cherbourg.