The Longues-sur-Mer battery was a World War II artillery battery constructed by the Wehrmacht near the French village of Longues-sur-Mer in Normandy. It formed a part of Germany's Atlantic Wall coastal fortifications.

The battery was completed by April 1944.[1] Although constructed and manned initially by the Kriegsmarine, the battery was later transferred to the German army.[2] The site consisted of four 152-mm navy guns, each protected by a large concrete casemate, a command post, shelters for personnel and ammunition, and several defensive machine-gun emplacements.