| Saint-Didier | |
| Commune Status: | Commune |
| Arrondissement: | Montbard |
| Canton: | Semur-en-Auxois |
| Insee: | 21546 |
| Postal Code: | 21210 |
| Mayor: | Didier Dupuis[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 47.3306°N 4.1836°W |
| Elevation M: | 506 |
| Elevation Min M: | 420 |
| Elevation Max M: | 617 |
| Area Km2: | 21.14 |
Saint-Didier (in French pronounced as /sɛ̃ didje/) is a commune in the Côte-d'Or department in eastern France.