| Crastes | |
| Commune Status: | Commune |
| Arrondissement: | Auch |
| Canton: | Gascogne-Auscitaine |
| Insee: | 32112 |
| Postal Code: | 32270 |
| Mayor: | Sébastien Dabasse[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Grand Auch Cœur Gascogne |
| Coordinates: | 43.7244°N 0.7308°W |
| Elevation M: | 245 |
| Elevation Min M: | 131 |
| Elevation Max M: | 272 |
| Area Km2: | 19.25 |
Crastes (in French pronounced as /kʁast/; Occitan (post 1500);: Crastas) is a commune in the Gers department in southwestern France.
The river Auroue has its source in the commune.