| Castillon-Debats | |
| Commune Status: | Commune |
| Arrondissement: | Auch |
| Canton: | Fezensac |
| Insee: | 32088 |
| Postal Code: | 32190 |
| Mayor: | Hubert Raffin[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Artagnan de Fézensac |
| Coordinates: | 43.7303°N 0.2172°W |
| Elevation M: | 223 |
| Elevation Min M: | 117 |
| Elevation Max M: | 227 |
| Area Km2: | 35.05 |
Castillon-Debats is a commune in the Gers department in southwestern France.
The Auzoue forms part of the commune's eastern border and flows north through its northeastern part.