Siquijor has 134 barangays across 6 municipalities. 79 barangays (59%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Enrique Villanueva | 14 | 11 (79%) |
| Larena | 23 | 12 (52%) |
| Lazi | 18 | 10 (56%) |
| Maria | 22 | 14 (64%) |
| San Juan | 15 | 6 (40%) |
| Siquijor (Capital) | 42 | 26 (62%) |