Biliran has 132 barangays across 8 municipalities. 108 barangays (82%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Almeria | 13 | 10 (77%) |
| Biliran | 11 | 8 (73%) |
| Cabucgayan | 13 | 11 (85%) |
| Caibiran | 17 | 12 (71%) |
| Culaba | 17 | 16 (94%) |
| Kawayan | 20 | 20 (100%) |
| Maripipi | 15 | 15 (100%) |
| Naval (Capital) | 26 | 16 (62%) |