| Fossoy | |
| Commune Status: | Commune |
| Arrondissement: | Château-Thierry |
| Canton: | Château-Thierry |
| Insee: | 02328 |
| Postal Code: | 02650 |
| Mayor: | Hervé Leduc[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Région de Château-Thierry |
| Coordinates: | 49.0492°N 3.4833°W |
| Elevation M: | 100 |
| Elevation Min M: | 61 |
| Elevation Max M: | 234 |
| Area Km2: | 7.18 |
Fossoy (pronounced as /fr/) is a commune in the Aisne department in Hauts-de-France in northern France.