| La Roche-Derrien | |
| Native Name: | Ar Roc'h-Derrien |
| Image Coat Of Arms: | COA fr La Roche-Derrien.svg |
| Coordinates: | 48.7472°N -3.2583°W |
| Insee: | 22264 |
| Postal Code: | 22450 |
| Arrondissement: | Lannion |
| Canton: | Tréguier |
| Commune: | La Roche-Jaudy |
| Elevation Min M: | 2 |
| Elevation Max M: | 60 |
| Area Km2: | 1.84 |
| Population: | 1064 |
| Population Date: | 2022 |
| Population Footnotes: | [1] |
La Roche-Derrien (pronounced as /fr/; br|Ar Roc'h-Derrien) is a former commune in the Côtes-d'Armor department of Brittany in northwestern France. On 1 January 2019, it was merged into the new commune La Roche-Jaudy.[2]
Inhabitants of La Roche-Derrien are called rochois in French.