| Castéra-Verduzan | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Castéra-Verduzan (Gers).svg |
| Arrondissement: | Auch |
| Canton: | Baïse-Armagnac |
| Insee: | 32083 |
| Postal Code: | 32410 |
| Mayor: | Claude Nef[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Grand Auch Cœur Gascogne |
| Coordinates: | 43.8053°N 0.4314°W |
| Elevation M: | 119 |
| Elevation Min M: | 97 |
| Elevation Max M: | 221 |
| Area Km2: | 19.82 |
Castéra-Verduzan (in French pronounced as /kasteʁa vɛʁdyzɑ̃/; Occitan (post 1500);: Lo Casterar e Verdusan) is a commune in the Gers department in southwestern France.