| Bruc-sur-Aff | |
| Native Name: | (Gallo) |
| Commune Status: | Commune |
| Coordinates: | 47.8156°N -2.0175°W |
| Insee: | 35045 |
| Postal Code: | 35550 |
| Arrondissement: | Redon |
| Canton: | Redon |
| Mayor: | Philippe Eslan[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Redon Agglomération |
| Elevation Min M: | 12 |
| Elevation Max M: | 84 |
| Area Km2: | 21.23 |
Bruc-sur-Aff (in French pronounced as /bʁyk syʁ af/, literally Bruc on Aff; Breton: Brug; Gallo: Bruc) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.
Inhabitants of Bruc-sur-Aff are called Bruçois in French.