| Saint-Didier-en-Donjon | |
| Commune Status: | Commune |
| Arrondissement: | Vichy |
| Canton: | Dompierre-sur-Besbre |
| Insee: | 03226 |
| Postal Code: | 03130 |
| Mayor: | Jérome Lassot[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 46.3883°N 3.8594°W |
| Elevation M: | 280 |
| Elevation Min M: | 250 |
| Elevation Max M: | 321 |
| Area Km2: | 32.92 |
Saint-Didier-en-Donjon (in French pronounced as /sɛ̃ didje ɑ̃ dɔ̃ʒɔ̃/) is a commune located in the Allier department in Auvergne-Rhône-Alpes (central France).