| Saint-Ouen-d'Aunis | |
| Commune Status: | Commune |
| Arrondissement: | La Rochelle |
| Canton: | Marans |
| Insee: | 17376 |
| Postal Code: | 17230 |
| Mayor: | Valérie Amy-Moie[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 46.2267°N -1.0339°W |
| Elevation M: | 4 |
| Elevation Min M: | 0 |
| Elevation Max M: | 25 |
| Area Km2: | 8.82 |
Saint-Ouen-d'Aunis (in French pronounced as /sɛ̃.t‿wɛ̃ doni(s)/, literally Saint-Ouen of Aunis) is a commune in the Charente-Maritime department in the Nouvelle-Aquitaine region in southwestern France.