| Castéron | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Castéron (Gers).svg |
| Arrondissement: | Condom |
| Canton: | Fleurance-Lomagne |
| Insee: | 32084 |
| Postal Code: | 32380 |
| Mayor: | Christiane Pieters[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.8928°N 0.8617°W |
| Elevation M: | 266 |
| Elevation Min M: | 165 |
| Elevation Max M: | 267 |
| Area Km2: | 11.08 |
Castéron (in French pronounced as /kasteʁɔ̃/; Occitan (post 1500);: Lo Casteron) is a commune in the Gers department in southwestern France.