| Saint-Hélen | |
| Native Name: | Sant-Haelen |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Saint-Hélen (Côtes-d'Armor).svg |
| Coordinates: | 48.4719°N -1.9589°W |
| Insee: | 22299 |
| Postal Code: | 22100 |
| Arrondissement: | Dinan |
| Canton: | Lanvallay |
| Mayor: | Marie-Christine Pinard[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Dinan Agglomération |
| Elevation Min M: | 7 |
| Elevation Max M: | 87 |
| Area Km2: | 17.02 |
Saint-Hélen (in French pronounced as /sɛ̃.t‿elɛ̃/; Breton: Sant-Haelen) is a commune in the Côtes-d'Armor département of Brittany in northwestern France.
Inhabitants of Saint-Hélen are called hélennais in French.