| Ouvrage Mottemberg | |
| Partof: | Maginot Line |
| Location: | Northeast France |
| Coordinates: | 49.1475°N 6.5944°W |
| Map Type: | France |
| Map Size: | 280 |
| Materials: | Concrete, steel, deep excavation |
| Used: | Abandoned |
| Controlledby: | France |
| Battles: | Battle of France |
Ouvrage Mottenberg is a lesser work (petit ouvrage) of the Maginot Line. Part of the Fortified Sector of Boulay, the ouvrage consists of one entrance block and two infantry blocks, and is located between petits ouvrages Coume Annexe Sud and Kerfent, facing Germany.
The site was surveyed by CORF (Commission d'Organisation des Régions Fortifiées), the Maginot Line's design and construction agency; Mottenberg was approved for construction in September 1931. It was completed at a cost of 13 million francs by the contractor Societé Alsacienne des Travaux Publics.