| Brignac | |
| Native Name: | Brennieg |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Brignac (Morbihan).svg |
| Coordinates: | 48.1217°N -2.3869°W |
| Insee: | 56025 |
| Postal Code: | 56430 |
| Arrondissement: | Pontivy |
| Canton: | Ploërmel |
| Mayor: | Martial Le Breton[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Ploërmel Communauté |
| Elevation Min M: | 68 |
| Elevation Max M: | 126 |
| Area Km2: | 13.12 |
Brignac (in French pronounced as /bʁiɲak/; Breton: Brennieg) is a commune in the Morbihan department of Brittany in northwestern France.
Inhabitants of Brignac are called Brignacois in French.