| Tréogan | |
| Native Name: | Treogan |
| Commune Status: | Commune |
| Image Coat Of Arms: | CoA fr Tréogan.svg |
| Coordinates: | 48.19°N -3.5186°W |
| Insee: | 22373 |
| Postal Code: | 22340 |
| Arrondissement: | Guingamp |
| Canton: | Rostrenen |
| Mayor: | Thierry Dahirel[1] |
| Term: | 2021 - 2026 |
| Intercommunality: | Poher Communauté |
| Elevation Min M: | 135 |
| Elevation Max M: | 293 |
| Area Km2: | 7.10 |
Tréogan is a commune in the Côtes-d'Armor department of Brittany in northwestern France.
Inhabitants of Tréogan are called tréoganais in French.