| Boust | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Boust (Moselle).svg |
| Arrondissement: | Thionville |
| Canton: | Yutz |
| Insee: | 57104 |
| Postal Code: | 57570 |
| Mayor: | Guy Kremer[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Cattenom et environs |
| Coordinates: | 49.4347°N 6.1903°W |
| Elevation M: | 230 |
| Elevation Min M: | 166 |
| Elevation Max M: | 259 |
| Area Km2: | 7.01 |
Boust (pronounced as /fr/;) is a commune in the Moselle department in Grand Est in northeastern France.
The localities of Basse Parthe (German: Niederparth), Haute Parthe (German: Oberparth) and Usselskirch (German: Usselskirch) are incorporated in the commune.