| Saint-Yon | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Yon (Essonne).svg |
| Coordinates: | 48.5606°N 2.184°W |
| Insee: | 91581 |
| Postal Code: | 91650 |
| Arrondissement: | Étampes |
| Canton: | Arpajon |
| Mayor: | Alexandre Touzet[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 52 |
| Elevation Max M: | 154 |
| Area Km2: | 4.66 |
Saint-Yon (in French pronounced as /sɛ̃.t‿jɔ̃/) is a commune in the Essonne department in Île-de-France in northern France.
Inhabitants of Saint-Yon are known as Saint-Yonais.