| Fontaines-sur-Marne | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Dizier |
| Canton: | Eurville-Bienville |
| Insee: | 52203 |
| Postal Code: | 52170 |
| Mayor: | Jean Marchandet[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Saint-Dizier Der et Blaise |
| Coordinates: | 48.5456°N 5.1033°W |
| Elevation M: | 170 |
| Elevation Min M: | 162 |
| Elevation Max M: | 309 |
| Area Km2: | 6.47 |
Fontaines-sur-Marne is a commune in the Haute-Marne department in north-eastern France.