| Gillonnay | |
| Commune Status: | Commune |
| Arrondissement: | Vienne |
| Canton: | Bièvre |
| Insee: | 38180 |
| Postal Code: | 38260 |
| Mayor: | Jean-Paul Jullien-Vieroz[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Bièvre Isère |
| Coordinates: | 45.3936°N 5.2978°W |
| Elevation M: | 380 |
| Elevation Min M: | 346 |
| Elevation Max M: | 633 |
| Area Km2: | 14.29 |
Gillonnay (in French pronounced as /ʒijɔnɛ/) is a commune in the Isère department in southeastern France.