| Saint-Izaire | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Izaire (Aveyron).svg |
| Arrondissement: | Millau |
| Canton: | Saint-Affrique |
| Insee: | 12228 |
| Postal Code: | 12480 |
| Mayor: | Christian Vernhet[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.9756°N 2.7214°W |
| Elevation M: | 240 |
| Elevation Min M: | 234 |
| Elevation Max M: | 620 |
| Area Km2: | 34.48 |
Saint-Izaire (in French pronounced as /sɛ̃.t‿izɛʁ/; Languedocien: Sent Esèri) is a commune in the Aveyron department in southern France.
The Château de Saint-Izaire is a 14th-century episcopal castle.
The commune is traversed by the Dourdou de Camarès River.