| Sillas | |
| Commune Status: | Commune |
| Arrondissement: | Langon |
| Canton: | Le Sud-Gironde |
| Insee: | 33513 |
| Postal Code: | 33690 |
| Mayor: | Michel Desqueyroux[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Bazadais |
| Coordinates: | 44.375°N -0.06°W |
| Elevation M: | 125 |
| Elevation Min M: | 104 |
| Elevation Max M: | 141 |
| Area Km2: | 7.63 |
Sillas is a commune in the Gironde department in Nouvelle-Aquitaine in southwestern France.