| Saint-Didier | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Didier (Vaucluse).svg |
| Arrondissement: | Carpentras |
| Canton: | Pernes-les-Fontaines |
| Insee: | 84108 |
| Postal Code: | 84210 |
| Mayor: | Gilles Vève[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Ventoux-Comtat Venaissin |
| Coordinates: | 44.0069°N 5.11°W |
| Elevation M: | 184 |
| Elevation Min M: | 127 |
| Elevation Max M: | 262 |
| Area Km2: | 3.62 |
Saint-Didier (in French pronounced as /sɛ̃ didje/; Provençal: Sant Deidier) is a commune in the Vaucluse department in the Provence-Alpes-Côte d'Azur region in southeastern France.