| Seignelay | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Seignelay 89.svg |
| Coordinates: | 47.9042°N 3.6025°W |
| Insee: | 89382 |
| Postal Code: | 89250 |
| Arrondissement: | Auxerre |
| Canton: | Saint-Florentin |
| Mayor: | Thierry Corniot[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 88 |
| Elevation Max M: | 192 |
| Area Km2: | 13.47 |
Seignelay (pronounced as /fr/) is a commune in the Yonne department in Bourgogne-Franche-Comté in north-central France. The regional historian Vaast Barthélemy Henry (1797–1884) was born in Seignelay.