| Saint-Géréon | |
| Image Coat Of Arms: | Blason ville fr Saint-Géréon (Loire-Atlantique).svg |
| Arrondissement: | Châteaubriant-Ancenis |
| Canton: | Ancenis-Saint-Géréon |
| Insee: | 44160 |
| Postal Code: | 44150 |
| Commune: | Ancenis-Saint-Géréon |
| Coordinates: | 47.37°N -1.1972°W |
| Elevation M: | 28 |
| Elevation Min M: | 6 |
| Elevation Max M: | 51 |
| Area Km2: | 7.51 |
| Population: | 2939 |
| Population Date: | 2016 |
| Population Footnotes: | [1] |
Saint-Géréon (in French pronounced as /sɛ̃ ʒeʁeɔ̃/) is a former commune in the Loire-Atlantique department in western France. On 1 January 2019, it was merged into the new commune of Ancenis-Saint-Géréon.[2]