| Saint-Didier d'Aussiat | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Saint-Didier-d'Aussiat (Ain).svg |
| Arrondissement: | Bourg-en-Bresse |
| Canton: | Attignat |
| Insee: | 01346 |
| Postal Code: | 01340 |
| Mayor: | Catherine Picard[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Bassin de Bourg-en-Bresse |
| Coordinates: | 46.3069°N 5.0617°W |
| Elevation Min M: | 194 |
| Elevation Max M: | 223 |
| Area Km2: | 15.22 |
Saint-Didier-d'Aussiat (in French pronounced as /sɛ̃ didje dosja/) is a commune in the Ain department in eastern France.