| Varennes-sous-Dun | |
| Commune Status: | Commune |
| Insee: | 71559 |
| Postal Code: | 71800 |
| Arrondissement: | Charolles |
| Canton: | Chauffailles |
| Coordinates: | 46.2903°N 4.3339°W |
| Elevation M: | 300 |
| Elevation Min M: | 347 |
| Elevation Max M: | 712 |
| Area Km2: | 17.76 |
Varennes-sous-Dun (in French pronounced as /vaʁɛn su dœ̃/) is a commune in the Saône-et-Loire department in the region of Bourgogne-Franche-Comté in eastern France.