| Semillac | |
| Commune Status: | Commune |
| Arrondissement: | Jonzac |
| Canton: | Pons |
| Insee: | 17423 |
| Postal Code: | 17150 |
| Mayor: | Charles Pain[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 45.3967°N -0.5942°W |
| Elevation Min M: | 48 |
| Elevation Max M: | 89 |
| Area Km2: | 2.47 |
Semillac (in French pronounced as /səmijak/) is a commune in the Charente-Maritime department in the Nouvelle-Aquitaine region in southwestern France.