Santa Barbara comprises 60 barangays with an estimated population of 70,861. 28 of its barangays (47%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Agusipan | 790 | 1 | Crowdsourced signal only (no registered tower) |
| Agutayan | 1,692 | 0 | Dead zone: no towers from any source |
| Bagumbayan | 729 | 0 | Dead zone: no towers from any source |
| Balabag | 1,490 | 0 | Dead zone: no towers from any source |
| Balibagan Este | 1,735 | 7 | Crowdsourced signal only (no registered tower) |
| Balibagan Oeste | 1,171 | 4 | Crowdsourced signal only (no registered tower) |
| Ban-ag | 297 | 0 | Dead zone: no towers from any source |
| Bantay | 250 | 0 | Dead zone: no towers from any source |
| Barangay Zone I (Pob.) | 1,002 | 2 | Crowdsourced signal only (no registered tower) |
| Barangay Zone II (Pob.) | 1,787 | 1 | Crowdsourced signal only (no registered tower) |
| Barangay Zone III (Pob.) | 733 | 1 | Crowdsourced signal only (no registered tower) |
| Barangay Zone IV (Pob.) | 2,372 | 3 | Crowdsourced signal only (no registered tower) |
| Barangay Zone V (Pob.) | 573 | 0 | Dead zone: no towers from any source |
| Barangay Zone VI (Pob.) | 4,377 | 1 | Crowdsourced signal only (no registered tower) |
| Barasan Este | 438 | 0 | Dead zone: no towers from any source |
| Barasan Oeste | 395 | 0 | Dead zone: no towers from any source |
| Binangkilan | 928 | 0 | Dead zone: no towers from any source |
| Bitaog-Taytay | 202 | 1 | Crowdsourced signal only (no registered tower) |
| Bolong Este | 1,233 | 8 | Crowdsourced signal only (no registered tower) |
| Bolong Oeste | 2,510 | 12 | Crowdsourced signal only (no registered tower) |
| Buayahon | 1,488 | 0 | Dead zone: no towers from any source |
| Buyo | 1,570 | 3 | Crowdsourced signal only (no registered tower) |
| Cabugao Norte | 2,540 | 1 | Crowdsourced signal only (no registered tower) |
| Cabugao Sur | 2,529 | 3 | Crowdsourced signal only (no registered tower) |
| Cadagmayan Norte | 2,931 | 10 | Crowdsourced signal only (no registered tower) |
| Cadagmayan Sur | 134 | 3 | Crowdsourced signal only (no registered tower) |
| Cafe | 1,381 | 0 | Dead zone: no towers from any source |
| Calaboa Este | 626 | 0 | Dead zone: no towers from any source |
| Calaboa Oeste | 197 | 0 | Dead zone: no towers from any source |
| Camambugan | 943 | 1 | Crowdsourced signal only (no registered tower) |
| Canipayan | 911 | 0 | Dead zone: no towers from any source |
| Conaynay | 355 | 0 | Dead zone: no towers from any source |
| Daga | 1,698 | 1 | Crowdsourced signal only (no registered tower) |
| Dalid | 768 | 2 | Crowdsourced signal only (no registered tower) |
| Duyanduyan | 1,687 | 6 | Crowdsourced signal only (no registered tower) |
| Gen. Martin T. Delgado | 1,660 | 0 | Dead zone: no towers from any source |
| Guno | 636 | 0 | Dead zone: no towers from any source |
| Inangayan | 4,017 | 6 | Crowdsourced signal only (no registered tower) |
| Jibao-an | 708 | 1 | Crowdsourced signal only (no registered tower) |
| Lacadon | 878 | 0 | Dead zone: no towers from any source |
| Lanag | 2,653 | 2 | Crowdsourced signal only (no registered tower) |
| Lupa | 780 | 0 | Dead zone: no towers from any source |
| Magancina | 924 | 1 | Crowdsourced signal only (no registered tower) |
| Malawog | 620 | 3 | Crowdsourced signal only (no registered tower) |
| Mambuyo | 596 | 0 | Dead zone: no towers from any source |
| Manhayang | 393 | 0 | Dead zone: no towers from any source |
| Miraga-Guibuangan | 2,510 | 0 | Dead zone: no towers from any source |
| Nasugban | 958 | 5 | Crowdsourced signal only (no registered tower) |
| Omambog | 125 | 0 | Dead zone: no towers from any source |
| Pal-Agon | 725 | 2 | Crowdsourced signal only (no registered tower) |
| Pungsod | 226 | 0 | Dead zone: no towers from any source |
| San Sebastian | 1,197 | 4 | Crowdsourced signal only (no registered tower) |
| Sangcate | 583 | 0 | Dead zone: no towers from any source |
| Tagsing | 1,582 | 3 | Crowdsourced signal only (no registered tower) |
| Talanghauan | 702 | 1 | Crowdsourced signal only (no registered tower) |
| Talongadian | 951 | 2 | Crowdsourced signal only (no registered tower) |
| Tigtig | 692 | 0 | Dead zone: no towers from any source |
| Tuburan | 505 | 3 | Crowdsourced signal only (no registered tower) |
| Tugas | 543 | 0 | Dead zone: no towers from any source |
| Tungay | 1,235 | 0 | Dead zone: no towers from any source |