| Saint-Agnant | |
| Commune Status: | Commune |
| Arrondissement: | Rochefort |
| Canton: | Marennes |
| Insee: | 17308 |
| Postal Code: | 17620 |
| Mayor: | Bernard Giraud[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Rochefort Océan |
| Coordinates: | 45.8731°N -0.96°W |
| Elevation M: | 11 |
| Elevation Min M: | 2 |
| Elevation Max M: | 24 |
| Area Km2: | 22.49 |
Saint-Agnant (in French pronounced as /sɛ̃.t‿aɲɑ̃/) is a commune in the Charente-Maritime department in southwestern France.