Sulu has 410 barangays across 19 municipalities. 378 barangays (92%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Hadji Panglima Tahil (Marunggas) | 5 | 5 (100%) |
| Indanan | 34 | 31 (91%) |
| Jolo (Capital) | 8 | 3 (38%) |
| Kalingalan Caluang | 9 | 7 (78%) |
| Lugus | 17 | 17 (100%) |
| Luuk | 12 | 7 (58%) |
| Maimbung | 27 | 26 (96%) |
| Old Panamao | 31 | 27 (87%) |
| Omar | 8 | 8 (100%) |
| Pandami | 16 | 16 (100%) |
| Panglima Estino (New Panamao) | 12 | 9 (75%) |
| Pangutaran | 16 | 16 (100%) |
| Parang | 40 | 37 (92%) |
| Pata | 14 | 14 (100%) |
| Patikul | 30 | 27 (90%) |
| Siasi | 50 | 49 (98%) |
| Talipao | 52 | 50 (96%) |
| Tapul | 15 | 15 (100%) |
| Tongkil | 14 | 14 (100%) |