| Saint-Eulien | |
| Commune Status: | Commune |
| Arrondissement: | Vitry-le-François |
| Canton: | Sermaize-les-Bains |
| Insee: | 51478 |
| Postal Code: | 51100 |
| Mayor: | Régis Valton[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Saint-Dizier Der et Blaise |
| Coordinates: | 48.6844°N 4.8831°W |
| Elevation M: | 141 |
| Elevation Min M: | 131 |
| Elevation Max M: | 174 |
| Area Km2: | 8.06 |
Saint-Eulien (in French pronounced as /sɛ̃.t‿øljɛ̃/) is a commune in the Marne department in north-eastern France.[2]