| Saint-Sornin | |
| Commune Status: | Commune |
| Arrondissement: | Rochefort |
| Canton: | Marennes |
| Insee: | 17406 |
| Postal Code: | 17600 |
| Mayor: | Joël Papineau[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 45.7694°N -0.9778°W |
| Elevation M: | 15 |
| Elevation Min M: | 0 |
| Elevation Max M: | 31 |
| Area Km2: | 13.49 |
Saint-Sornin (in French pronounced as /sɛ̃ sɔʁnɛ̃/) is a commune in the Charente-Maritime department in southwestern France.
Saint Sornin is just off the main road between Saintes and Marennes. There is only a bar/cafe and a bakery in the village, with the closest shops in Marennes. There is a small campsite just outside the village on the road to Brue. The road to Brue is a dead end, but there are some old ruins and a small bird life museum at the end of the road.