| Francillon-sur-Roubion | |
| Commune Status: | Commune |
| Arrondissement: | Die |
| Canton: | Dieulefit |
| Insee: | 26137 |
| Postal Code: | 26400 |
| Mayor: | Jean-Michel Gaudet[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC du Val de Drôme en Biovallée |
| Demonym: | Francillonnais |
| Coordinates: | 44.6247°N 5.0872°W |
| Elevation M: | 462 |
| Elevation Min M: | 287 |
| Elevation Max M: | 651 |
| Area Km2: | 10.8 |
Francillon-sur-Roubion (in French pronounced as /fʁɑ̃sijɔ̃ syʁ ʁubjɔ̃/; Occitan (post 1500);: Francilhon) is a commune in the Drôme department in the Auvergne-Rhône-Alpes region in Southeastern France. In 2021, it had a population of 188.