| Saint-Médard-d'Aunis | |
| Commune Status: | Commune |
| Arrondissement: | La Rochelle |
| Canton: | La Jarrie |
| Insee: | 17373 |
| Postal Code: | 17220 |
| Mayor: | Roger Gervais[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA La Rochelle |
| Coordinates: | 46.1599°N -0.9569°W |
| Elevation M: | 30 |
| Elevation Min M: | 4 |
| Elevation Max M: | 44 |
| Area Km2: | 22.53 |
Saint-Médard-d'Aunis (in French pronounced as /sɛ̃ medaʁ doni(s)/, literally Saint-Médard of Aunis) is a commune in the Charente-Maritime department in the Nouvelle-Aquitaine region in southwestern France.