| Bost | |
| Commune Status: | Commune |
| Arrondissement: | Vichy |
| Canton: | Cusset |
| Insee: | 03033 |
| Postal Code: | 03300 |
| Mayor: | Sébastien Baud[1] |
| Term: | 2021 - 2026 |
| Intercommunality: | CA Vichy Communauté |
| Coordinates: | 46.1797°N 3.5194°W |
| Elevation M: | 284 |
| Elevation Min M: | 267 |
| Elevation Max M: | 429 |
| Area Km2: | 9.48 |
Bost is a commune in the Allier department in central France. The town is part of the Vichy urban area and has a twelfth-century church, St-Pierre.