| Fossemanant | |
| Commune Status: | Commune |
| Arrondissement: | Amiens |
| Canton: | Ailly-sur-Noye |
| Insee: | 80334 |
| Postal Code: | 80160 |
| Mayor: | André Lefèvre[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Somme Sud-Ouest |
| Coordinates: | 49.8039°N 2.1989°W |
| Elevation M: | 53 |
| Elevation Min M: | 40 |
| Elevation Max M: | 128 |
| Area Km2: | 2.7 |
Fossemanant (pronounced as /fr/; pcd|Fosménant) is a commune in the Somme department in Hauts-de-France in northern France.
Fossemanant is situated on the D8 road, some 8miles southwest of Amiens on the banks of the river Selle, a small tributary of the river Somme.