| Ruca | |
| Native Name: | Ruskad |
| Commune Status: | Commune |
| Coordinates: | 48.5681°N -2.3381°W |
| Arrondissement: | Dinan |
| Canton: | Pléneuf-Val-André |
| Insee: | 22268 |
| Postal Code: | 22550 |
| Mayor: | Dominique Perche[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Dinan Agglomération |
| Elevation M: | 45 |
| Elevation Min M: | 22 |
| Elevation Max M: | 79 |
| Area Km2: | 12.13 |
Ruca (pronounced as /fr/;) is a commune in the Côtes-d'Armor department in Brittany in northwestern France.
Inhabitants of Ruca are called rucassiens in French.