| Saint-Magne | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Magne (Gironde).svg |
| Arrondissement: | Arcachon |
| Canton: | Les Landes des Graves |
| Insee: | 33436 |
| Postal Code: | 33125 |
| Mayor: | Ghislaine Charles[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Val de l'Eyre |
| Coordinates: | 44.5281°N -0.6567°W |
| Elevation M: | 70 |
| Elevation Min M: | 50 |
| Elevation Max M: | 81 |
| Area Km2: | 82.66 |
Saint-Magne (in French pronounced as /sɛ̃ maɲ/; Occitan (post 1500);: Sent Manhe) is a commune in the Gironde department in Nouvelle-Aquitaine in southwestern France.