| Sépeaux | |
| Coordinates: | 47.9433°N 3.2361°W |
| Insee: | 89388 |
| Postal Code: | 89116 |
| Arrondissement: | Sens |
| Canton: | Charny Orée de Puisaye |
| Commune: | Sépeaux-Saint-Romain |
| Elevation Min M: | 108 |
| Elevation Max M: | 203 |
| Area Km2: | 19.91 |
| Population: | 354 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Sépeaux (in French pronounced as /sepo/) is a former commune in the Yonne department in Bourgogne-Franche-Comté in north-central France. On 1 January 2016, it was merged into the new commune of Sépeaux-Saint-Romain.[2]