| Somsois | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Somsois (Marne).svg |
| Arrondissement: | Vitry-le-François |
| Canton: | Vitry-le-François-Champagne et Der |
| Insee: | 51551 |
| Postal Code: | 51290 |
| Mayor: | Joël Loiselet[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Vitry, Champagne et Der |
| Coordinates: | 48.5967°N 4.5042°W |
| Elevation M: | 137 |
| Area Km2: | 21.31 |
Somsois (pronounced as /fr/) is a commune in the Marne department in north-eastern France.