| Fontenailles | |
| Coordinates: | 47.6325°N 3.4669°W |
| Insee: | 89174 |
| Postal Code: | 89560 |
| Arrondissement: | Auxerre |
| Canton: | Vincelles |
| Commune: | Les Hauts de Forterre |
| Elevation Min M: | 243 |
| Elevation Max M: | 346 |
| Area Km2: | 2.76 |
| Population: | 66 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Fontenailles (in French pronounced as /fɔ̃tnaj/) is a former commune in the Yonne department in Bourgogne-Franche-Comté in north-central France. On 1 January 2017, it was merged into the new commune Les Hauts de Forterre.[2]