| Fontenailles | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Fontenailles (Seine-et-Marne).svg |
| Coordinates: | 48.5557°N 2.9527°W |
| Insee: | 77191 |
| Postal Code: | 77370 |
| Arrondissement: | Provins |
| Canton: | Nangis |
| Mayor: | Ghislaine Harscoet[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Brie Nangissienne |
| Elevation Min M: | 92 |
| Elevation Max M: | 130 |
| Area Km2: | 27.44 |
Fontenailles (in French pronounced as /fɔ̃tnaj/) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.
Inhabitants of Fontenailles are called Fontenaillais.