| Isolaccio-di-Fiumorbo | |
| Commune Status: | Commune |
| Arrondissement: | Corte |
| Canton: | Fiumorbo-Castello |
| Insee: | 2B135 |
| Postal Code: | 20243 |
| Mayor: | Jacky Bartoli[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Fium'orbu Castellu |
| Coordinates: | 42.0031°N 9.2814°W |
| Elevation M: | 740 |
| Elevation Min M: | 119 |
| Elevation Max M: | 2036 |
| Area Km2: | 40.89 |
Isolaccio-di-Fiumorbo (in French pronounced as /izɔlaksjo di fjymɔʁbo/) is a commune in the Haute-Corse department of France on the island of Corsica.