Sorsogon has 541 barangays across 15 municipalities. 406 barangays (75%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Barcelona | 25 | 22 (88%) |
| Bulan | 63 | 53 (84%) |
| Bulusan | 24 | 17 (71%) |
| Casiguran | 25 | 18 (72%) |
| Castilla | 34 | 27 (79%) |
| City of Sorsogon (Capital) | 64 | 24 (38%) |
| Donsol | 51 | 46 (90%) |
| Gubat | 42 | 31 (74%) |
| Irosin | 28 | 15 (54%) |
| Juban | 25 | 18 (72%) |
| Magallanes | 34 | 33 (97%) |
| Matnog | 40 | 28 (70%) |
| Pilar | 49 | 43 (88%) |
| Prieto Diaz | 23 | 18 (78%) |
| Santa Magdalena | 14 | 13 (93%) |