| Vieux-Viel | |
| Native Name: | (Gallo) |
| Commune Status: | Commune |
| Coordinates: | 48.5119°N -1.5433°W |
| Insee: | 35354 |
| Postal Code: | 35610 |
| Arrondissement: | Saint-Malo |
| Canton: | Dol-de-Bretagne |
| Mayor: | Gérard Dufeu[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays de Dol et Baie du Mont Saint-Michel |
| Elevation Min M: | 14 |
| Elevation Max M: | 108 |
| Area Km2: | 8.77 |
Vieux-Viel (in French pronounced as /vjø vjɛl/; Gallo: Vioez-Viéu, Breton: Henwiel) is a commune in the Ille-et-Vilaine department of Brittany in northwestern France.
Inhabitants of Vieux-Viel are called in French Vieux-Viellois.