| Tillac | |
| Commune Status: | Commune |
| Arrondissement: | Mirande |
| Canton: | Pardiac-Rivière-Basse |
| Insee: | 32446 |
| Postal Code: | 32170 |
| Mayor: | Alain Audirac[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Bastides et vallons du Gers |
| Coordinates: | 43.4761°N 0.2764°W |
| Elevation M: | 160 |
| Elevation Min M: | 170 |
| Elevation Max M: | 264 |
| Area Km2: | 12.47 |
Tillac (pronounced as /fr/; oc|Tilhac) is a commune in the Gers department in southwestern France.