Zamboanga Sibugay has 389 barangays across 16 municipalities. 284 barangays (73%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Alicia | 27 | 24 (89%) |
| Buug | 27 | 20 (74%) |
| Diplahan | 22 | 16 (73%) |
| Imelda | 18 | 10 (56%) |
| Ipil (Capital) | 28 | 10 (36%) |
| Kabasalan | 29 | 19 (66%) |
| Mabuhay | 18 | 16 (89%) |
| Malangas | 25 | 23 (92%) |
| Naga | 23 | 17 (74%) |
| Olutanga | 19 | 16 (84%) |
| Payao | 29 | 26 (90%) |
| Roseller Lim | 26 | 18 (69%) |
| Siay | 29 | 18 (62%) |
| Talusan | 14 | 10 (71%) |
| Titay | 30 | 24 (80%) |
| Tungawan | 25 | 17 (68%) |