| Saint-Uniac | |
| Native Name: | (Gallo) |
| Commune Status: | Commune |
| Coordinates: | 48.1739°N -2.0275°W |
| Insee: | 35320 |
| Postal Code: | 35360 |
| Arrondissement: | Rennes |
| Canton: | Montauban-de-Bretagne |
| Mayor: | Karine Passilly[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Saint-Méen Montauban |
| Elevation Min M: | 45 |
| Elevation Max M: | 96 |
| Area Km2: | 6.89 |
Saint-Uniac (in French pronounced as /sɛ̃.t‿ynjak/; ; Gallo: Saent-Tuniau) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.
Inhabitants of Saint-Uniac are called Saint-Uniacais in French.