| Lostroff | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Lostroff (Moselle).svg |
| Arrondissement: | Sarrebourg-Château-Salins |
| Canton: | Le Saulnois |
| Insee: | 57417 |
| Postal Code: | 57670 |
| Mayor: | Gaël Beyel[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC du Saulnois |
| Coordinates: | 48.8597°N 6.8536°W |
| Elevation M: | 250 |
| Elevation Min M: | 222 |
| Elevation Max M: | 285 |
| Area Km2: | 4.96 |
Lostroff (pronounced as /fr/;) is a commune in the Moselle department in Grand Est in north-eastern France.