| Tresbœuf | |
| Native Name: | (Gallo) |
| Commune Status: | Commune |
| Coordinates: | 47.8833°N -1.5447°W |
| Insee: | 35343 |
| Postal Code: | 35320 |
| Arrondissement: | Redon |
| Canton: | Bain-de-Bretagne |
| Mayor: | Laurence Roux[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Bretagne Porte de Loire |
| Elevation Min M: | 25 |
| Elevation Max M: | 113 |
| Area Km2: | 25.33 |
Tresbœuf (in French pronounced as /tʁɛbœf/; Gallo: Trébeu, Breton: Trevo) is a commune in the Ille-et-Vilaine department of Brittany in northwestern France.
The river Semnon forms part of the commune's southern border.
People from Tresbœuf are called tresbourgeois in French.