| Saint-Denoual | |
| Native Name: | Sant-Denwal |
| Commune Status: | Commune |
| Coordinates: | 48.5281°N -2.3992°W |
| Insee: | 22286 |
| Postal Code: | 22400 |
| Arrondissement: | Saint-Brieuc |
| Canton: | Pléneuf-Val-André |
| Mayor: | Jérémy Allain[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Lamballe Terre et Mer |
| Elevation Min M: | 44 |
| Elevation Max M: | 108 |
| Area Km2: | 8.61 |
Saint-Denoual (in French pronounced as /sɛ̃ dənwal/; Breton: Sant-Denwal) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.
Inhabitants of Saint-Denoual are called guinguenoualais in French.