| Bayard-sur-Marne | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Bayard-sur-Marne 52.svg |
| Arrondissement: | Saint-Dizier |
| Canton: | Eurville-Bienville |
| Insee: | 52265 |
| Postal Code: | 52170 |
| Mayor: | Bruno Prevot[1] |
| Term: | 2021 - 2026 |
| Intercommunality: | CA Saint-Dizier Der et Blaise |
| Coordinates: | 48.555°N 5.0775°W |
| Elevation M: | 165 |
| Elevation Min M: | 156 |
| Elevation Max M: | 272 |
| Area Km2: | 15.39 |
Bayard-sur-Marne (in French pronounced as /bajaʁ syʁ maʁn/, literally Bayard on Marne) is a commune in the Haute-Marne department in the Grand Est region in northeastern France. The commune was formed in 1973 by the merger of the former communes Laneuville-à-Bayard, Gourzon and Prez-sur-Marne.[2]