| Sancey-le-Long | |
| Coordinates: | 47.3064°N 6.6031°W |
| Insee: | 25530 |
| Postal Code: | 25430 |
| Arrondissement: | Montbéliard |
| Canton: | Bavans |
| Commune: | Sancey |
| Elevation Min M: | 480 |
| Elevation Max M: | 675 |
| Area Km2: | 7.02 |
| Population: | 345 |
| Population Date: | 2013 |
| Population Footnotes: | [1] |
Sancey-le-Long (in French pronounced as /sɑ̃sɛ lə lɔ̃/) is a former commune in the Doubs department in the Bourgogne-Franche-Comté region in eastern France. On 1 January 2016, it was merged into the new commune Sancey.[2]
The commune lies 51km (32miles) east of Besançon near the Swiss border.