| Onlay | |
| Commune Status: | Commune |
| Coordinates: | 46.9664°N 3.8972°W |
| Insee: | 58199 |
| Postal Code: | 58370 |
| Arrondissement: | Château-Chinon (Ville) |
| Canton: | Château-Chinon |
| Mayor: | Daniel Martin[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 272 |
| Elevation Max M: | 526 |
| Area Km2: | 19.54 |
Onlay (in French pronounced as /ɔ̃lɛ/) is a commune in the Nièvre department in central France.[2]
On 1 January 2019, the estimated population was 154.