| Saint-Masmes | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Masmes (Marne).svg |
| Arrondissement: | Reims |
| Canton: | Mourmelon-Vesle et Monts de Champagne |
| Insee: | 51505 |
| Postal Code: | 51490 |
| Mayor: | Hervé Chef[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CU Grand Reims |
| Coordinates: | 49.3125°N 4.2631°W |
| Elevation M: | 87 |
| Area Km2: | 6.58 |
Saint-Masmes (in French pronounced as /sɛ̃ mam/) is a commune in the Marne department in north-eastern France.
The commune is traversed by the Suippe river.