| Blaignac | |
| Commune Status: | Commune |
| Arrondissement: | Langon |
| Canton: | Le Réolais et Les Bastides |
| Insee: | 33054 |
| Postal Code: | 33190 |
| Mayor: | Bernard Vincente[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Réolais en Sud Gironde |
| Coordinates: | 44.5528°N -0.0556°W |
| Elevation M: | 50 |
| Elevation Min M: | 12 |
| Elevation Max M: | 63 |
| Area Km2: | 3.18 |
Blaignac (in French pronounced as /blɛɲak/; Occitan (post 1500);: Blanhac) is a commune in the Gironde department in Nouvelle-Aquitaine in southwestern France.