| Saint-Genès-de-Castillon | |
| Commune Status: | Commune |
| Arrondissement: | Libourne |
| Canton: | Les Coteaux de Dordogne |
| Insee: | 33406 |
| Postal Code: | 33350 |
| Mayor: | Yannick Guimberteau[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 44.8986°N -0.0644°W |
| Elevation M: | 99 |
| Elevation Min M: | 32 |
| Elevation Max M: | 98 |
| Area Km2: | 6.8 |
Saint-Genès-de-Castillon is a commune in the Gironde department in Nouvelle-Aquitaine in southwestern France.