Tawi-Tawi has 203 barangays across 11 municipalities. 192 barangays (95%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Bongao (Capital) | 35 | 26 (74%) |
| Languyan | 20 | 19 (95%) |
| Mapun (Cagayan de Tawi-Tawi) | 15 | 15 (100%) |
| Panglima Sugala (Balimbing) | 17 | 17 (100%) |
| Sapa-Sapa | 23 | 23 (100%) |
| Sibutu | 16 | 16 (100%) |
| Simunul | 15 | 15 (100%) |
| Sitangkai | 9 | 8 (89%) |
| South Ubian | 31 | 31 (100%) |
| Tandubas | 20 | 20 (100%) |
| Turtle Islands | 2 | 2 (100%) |