| Saint-Jouan-de-l'Isle | |
| Native Name: | Sant-Yowan-an-Enez |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Saint-Jouan-de-l'Isle (Côtes-d'Armor).svg |
| Coordinates: | 48.2683°N -2.1578°W |
| Insee: | 22305 |
| Postal Code: | 22350 |
| Arrondissement: | Dinan |
| Canton: | Broons |
| Mayor: | Gilles Coupu[1] |
| Term: | 2021 - 2026 |
| Intercommunality: | Dinan Agglomération |
| Elevation Min M: | 52 |
| Elevation Max M: | 131 |
| Area Km2: | 8.09 |
Saint-Jouan-de-l'Isle (in French pronounced as /sɛ̃ ʒwɑ̃ də lil/; Breton: Sant-Yowan-an-Enez) is a commune in the Côtes-d'Armor département of Brittany in northwestern France.
Inhabitants of Saint-Jouan-de-l'Isle are called saint-jouannais in French.