| Sion | |
| Commune Status: | Commune |
| Arrondissement: | Condom |
| Canton: | Grand-Bas-Armagnac |
| Insee: | 32434 |
| Postal Code: | 32110 |
| Mayor: | Élisabeth Mitterrand[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.7406°N 0.0097°W |
| Elevation M: | 140 |
| Elevation Min M: | 92 |
| Elevation Max M: | 166 |
| Area Km2: | 7.05 |
Sion (pronounced as /fr/) is a commune in the Gers department in southwestern France.