| Grancey-sur-Ource | |
| Commune Status: | Commune |
| Arrondissement: | Montbard |
| Canton: | Châtillon-sur-Seine |
| Insee: | 21305 |
| Postal Code: | 21570 |
| Mayor: | Roland Van Hecke[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays Châtillonnais |
| Coordinates: | 48.0086°N 4.5886°W |
| Elevation M: | 206 |
| Elevation Min M: | 190 |
| Elevation Max M: | 347 |
| Area Km2: | 23.94 |
Grancey-sur-Ource (in French pronounced as /ɡʁɑ̃sɛ syʁ uʁs/, literally Grancey on Ource) is a commune in the Côte-d'Or department in eastern France.
The village lies on the left bank of the Ource, which flows northwest through the northeastern part of the commune.