Jolo (Capital) comprises 8 barangays with an estimated population of 34,310. 3 of its barangays (38%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Alat | 177 | 1 | Crowdsourced signal only (no registered tower) |
| Asturias | 881 | 3 | Crowdsourced signal only (no registered tower) |
| Bus-bus | 22,513 | 9 | Crowdsourced signal only (no registered tower) |
| Chinese Pier | 1,993 | 0 | Dead zone: no towers from any source |
| San Raymundo | 3,698 | 20 | Crowdsourced signal only (no registered tower) |
| Takut-takut | 1,101 | 0 | Dead zone: no towers from any source |
| Tulay | 2,661 | 0 | Dead zone: no towers from any source |
| Walled City (Pob.) | 1,286 | 6 | Crowdsourced signal only (no registered tower) |