| Treteau | |
| Commune Status: | Commune |
| Arrondissement: | Vichy |
| Canton: | Moulins-2 |
| Insee: | 03289 |
| Postal Code: | 03220 |
| Mayor: | Arnaud Deligeard[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Entr'Allier Besbre et Loire |
| Coordinates: | 46.3683°N 3.5267°W |
| Elevation M: | 283 |
| Elevation Min M: | 253 |
| Elevation Max M: | 307 |
| Area Km2: | 31.28 |
Treteau is a commune in the Allier department in Auvergne-Rhône-Alpes in central France.