| Saint-Jean-Delnous | |
| Commune Status: | Commune |
| Arrondissement: | Millau |
| Canton: | Monts du Réquistanais |
| Insee: | 12230 |
| Postal Code: | 12170 |
| Mayor: | Gilbert Dalmayrac[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Réquistanais |
| Coordinates: | 44.045°N 2.4933°W |
| Elevation M: | 515 |
| Elevation Min M: | 350 |
| Elevation Max M: | 599 |
| Area Km2: | 18.29 |
Saint-Jean-Delnous (Languedocien: Sant Joan del Nos) is a commune in the Aveyron department in southern France.
The river Cérou has its source in the commune.