| Saint-Augustin | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la commune de Saint-Augustin - 17570 - France.jpg |
| Arrondissement: | Rochefort |
| Canton: | La Tremblade |
| Insee: | 17311 |
| Postal Code: | 17570 |
| Mayor: | Gwennaëlle Dohin-Prost[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Royan Atlantique |
| Coordinates: | 45.6789°N -1.0981°W |
| Elevation M: | 10 |
| Elevation Min M: | 0 |
| Elevation Max M: | 45 |
| Area Km2: | 18.83 |
Saint-Augustin (pronounced as /fr/) is a commune in the Charente-Maritime department in southwestern France.