| Saint-Mard-de-Vaux | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Mard-de-Vaux 71.svg |
| Insee: | 71447 |
| Postal Code: | 71640 |
| Arrondissement: | Chalon-sur-Saône |
| Canton: | Givry |
| Intercommunality: | CA Le Grand Chalon |
| Coordinates: | 46.8128°N 4.6847°W |
| Elevation M: | 375 |
| Elevation Min M: | 249 |
| Elevation Max M: | 502 |
| Area Km2: | 6.63 |
Saint-Mard-de-Vaux (in French pronounced as /sɛ̃ maʁ də vo/) is a commune in the Saône-et-Loire department in the region of Bourgogne-Franche-Comté in eastern France.