| Grenay | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Grenay38.svg |
| Arrondissement: | Vienne |
| Canton: | La Verpillière |
| Insee: | 38184 |
| Postal Code: | 38540 |
| Mayor: | Alain Cauquil[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Collines du Nord Dauphiné |
| Coordinates: | 45.6653°N 5.0803°W |
| Elevation M: | 310 |
| Elevation Min M: | 220 |
| Elevation Max M: | 321 |
| Area Km2: | 7.2 |
Grenay (pronounced as /fr/) is a commune in the Isère department in southeastern France.