Santa Barbara comprises 29 barangays with an estimated population of 92,359. 11 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 |
|---|---|---|---|
| Alibago | 1,427 | 0 | Dead zone: no towers from any source |
| Balingueo | 3,407 | 0 | Dead zone: no towers from any source |
| Banaoang | 4,499 | 7 | Crowdsourced signal only (no registered tower) |
| Banzal | 1,377 | 0 | Dead zone: no towers from any source |
| Botao | 2,773 | 0 | Dead zone: no towers from any source |
| Cablong | 2,643 | 3 | Crowdsourced signal only (no registered tower) |
| Carusocan | 1,047 | 0 | Dead zone: no towers from any source |
| Dalongue | 3,156 | 2 | Crowdsourced signal only (no registered tower) |
| Erfe | 448 | 0 | Dead zone: no towers from any source |
| Gueguesangen | 2,408 | 2 | Crowdsourced signal only (no registered tower) |
| Leet | 8,561 | 0 | Dead zone: no towers from any source |
| Malanay | 2,866 | 0 | Dead zone: no towers from any source |
| Maningding | 4,384 | 19 | Crowdsourced signal only (no registered tower) |
| Maronong | 3,084 | 5 | Crowdsourced signal only (no registered tower) |
| Maticmatic | 3,620 | 14 | Crowdsourced signal only (no registered tower) |
| Minien East | 6,086 | 7 | Crowdsourced signal only (no registered tower) |
| Minien West | 1,559 | 5 | Crowdsourced signal only (no registered tower) |
| Nilombot | 1,998 | 4 | Crowdsourced signal only (no registered tower) |
| Patayac | 2,583 | 0 | Dead zone: no towers from any source |
| Payas | 3,661 | 14 | Crowdsourced signal only (no registered tower) |
| Poblacion Norte | 1,477 | 3 | Crowdsourced signal only (no registered tower) |
| Poblacion Sur | 944 | 3 | Crowdsourced signal only (no registered tower) |
| Primicias (Ventinilla West) | 3,810 | 1 | Crowdsourced signal only (no registered tower) |
| Sapang | 1,175 | 0 | Dead zone: no towers from any source |
| Sonquil | 5,217 | 0 | Dead zone: no towers from any source |
| Tebag East | 1,402 | 2 | Crowdsourced signal only (no registered tower) |
| Tebag West | 2,041 | 5 | Crowdsourced signal only (no registered tower) |
| Tuliao | 11,049 | 8 | Crowdsourced signal only (no registered tower) |
| Ventinilla (Ventinilla East) | 3,657 | 3 | Crowdsourced signal only (no registered tower) |