| Saint-Gein | |
| Commune Status: | Commune |
| Arrondissement: | Mont-de-Marsan |
| Canton: | Adour Armagnac |
| Insee: | 40259 |
| Postal Code: | 40190 |
| Mayor: | Jean-Pierre Catuhe[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays de Villeneuve en Armagnac Landais |
| Coordinates: | 43.8361°N -0.3°W |
| Elevation M: | 90 |
| Elevation Min M: | 69 |
| Elevation Max M: | 127 |
| Area Km2: | 17.85 |
Saint-Gein (pronounced as /fr/; oc|Sent Genh) is a commune in the Landes department in Nouvelle-Aquitaine in southwestern France.[2]