| Magny-la-Fosse | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Quentin |
| Canton: | Bohain-en-Vermandois |
| Insee: | 02451 |
| Postal Code: | 02420 |
| Mayor: | Yannick Camus[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays du Vermandois |
| Coordinates: | 49.9344°N 3.2753°W |
| Elevation M: | 103 |
| Elevation Min M: | 92 |
| Elevation Max M: | 144 |
| Area Km2: | 3.63 |
Magny-la-Fosse (pronounced as /fr/) is a commune in the Aisne department in Hauts-de-France in northern France.