| Poinson-lès-Grancey | |
| Commune Status: | Commune |
| Arrondissement: | Langres |
| Canton: | Villegusien-le-Lac |
| Insee: | 52395 |
| Postal Code: | 52160 |
| Mayor: | Jacques Boiget[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Auberive Vingeanne et Montsaugeonnais |
| Coordinates: | 47.7083°N 4.9864°W |
| Elevation M: | 433 |
| Elevation Min M: | 369 |
| Elevation Max M: | 489 |
| Area Km2: | 11.68 |
Poinson-lès-Grancey (in French pronounced as /pwɛ̃sɔ̃ lɛ ɡʁɑ̃sɛ/, literally Poinson near Grancey) is a commune in the Haute-Marne department in north-eastern France.
The Ource flows northeastward through the southern part of the commune, then forms its north-eastern border.