Valognes is a commune in the Manche department in Normandy in north-western France. Valognes is situated in the Cotentin Peninsula, sout…Valognes is a commune in the Manche department in Normandy in north-western France. Valognes is situated in the Cotentin Peninsula, southeast of Cherbourg. Valognes station has rail connections to Caen, Paris and Cherbourg.