| Sémelay | |
| Commune Status: | Commune |
| Coordinates: | 46.8525°N 3.8519°W |
| Insee: | 58276 |
| Postal Code: | 58360 |
| Arrondissement: | Château-Chinon (Ville) |
| Canton: | Luzy |
| Mayor: | Guy Laffaye[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 227 |
| Elevation Max M: | 530 |
| Area Km2: | 33.53 |
Sémelay (in French pronounced as /semlɛ/) is a commune in the Nièvre department in central France. The town of Sémelay belongs to the canton of Luzy and the arrondissement of Château-Chinon (Ville).[2]
The river Alène flows westward through the southern part of commune.
The town's area is 33.53 km2. It is situated at an altitude of about 294 meters.
On 1 January 2019, the estimated population was 221.