| Trémuson | |
| Native Name: | Tremuzon |
| Commune Status: | Commune |
| Image Coat Of Arms: | COA fr Trémuson.svg |
| Coordinates: | 48.5247°N -2.8483°W |
| Insee: | 22372 |
| Postal Code: | 22440 |
| Arrondissement: | Saint-Brieuc |
| Canton: | Plérin |
| Mayor: | Yvon Orgebin[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Saint-Brieuc Armor |
| Elevation Min M: | 30 |
| Elevation Max M: | 163 |
| Area Km2: | 6.31 |
Trémuson (in French pronounced as /tʁemyzɔ̃/;) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.
Inhabitants of Trémuson are called trémusonnais in French.