| Lavau | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Lavau 89.svg |
| Coordinates: | 47.5964°N 2.9881°W |
| Insee: | 89220 |
| Postal Code: | 89170 |
| Arrondissement: | Auxerre |
| Canton: | Cœur de Puisaye |
| Mayor: | Gérard d'Astorg[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 175 |
| Elevation Max M: | 261 |
| Area Km2: | 55.06 |
Lavau (pronounced as /fr/) is a commune in the Yonne department in Bourgogne-Franche-Comté in north-central France, in the historical region of Puisaye.