Santa Josefa comprises 11 barangays with an estimated population of 22,722. 6 of its barangays (55%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Angas | 3,413 | 0 | Dead zone: no towers from any source |
| Aurora | 1,936 | 0 | Dead zone: no towers from any source |
| Awao | 903 | 0 | Dead zone: no towers from any source |
| Concepcion | 1,339 | 0 | Dead zone: no towers from any source |
| Pag-asa | 564 | 0 | Dead zone: no towers from any source |
| Patrocinio | 3,581 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion | 3,763 | 4 | Crowdsourced signal only (no registered tower) |
| San Jose | 4,370 | 1 | Crowdsourced signal only (no registered tower) |
| Santa Isabel | 1,269 | 1 | Crowdsourced signal only (no registered tower) |
| Sayon | 755 | 2 | Crowdsourced signal only (no registered tower) |
| Tapaz | 829 | 0 | Dead zone: no towers from any source |