| Billy | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Billy (03).svg |
| Arrondissement: | Vichy |
| Canton: | Saint-Pourçain-sur-Sioule |
| Insee: | 03029 |
| Postal Code: | 03260 |
| Mayor: | Patrick Séror[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Vichy Communauté |
| Coordinates: | 46.2372°N 3.43°W |
| Elevation M: | 220 |
| Elevation Min M: | 235 |
| Elevation Max M: | 375 |
| Area Km2: | 10.22 |
| Website: | billy-allier.fr |
Billy (in French pronounced as /biji/; Occitan (post 1500);: Bilhi) is a commune in the Allier department in central France.
Between this village and nearby Créchy, lagerstätten have yielded a rich assemblage of fossils from the Oligocene-Miocene boundary (c. 24-23 million years ago).[2]