| Diesen | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Diesen (Moselle).svg |
| Arrondissement: | Forbach-Boulay-Moselle |
| Canton: | Saint-Avold |
| Insee: | 57765 |
| Postal Code: | 57890 |
| Mayor: | Gabriel Walkowiak[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Saint-Avold Synergie |
| Coordinates: | 49.1786°N 6.6789°W |
| Elevation Min M: | 213 |
| Elevation Max M: | 270 |
| Area Km2: | 5.47 |
Diesen (pronounced as /fr/; de|Diesen) is a commune in the Moselle department in Grand Est in north-eastern France.