Saint Bernard comprises 30 barangays with an estimated population of 22,187. 24 of its barangays (80%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Atuyan | 356 | 0 | Dead zone: no towers from any source |
| Ayahag | 115 | 0 | Dead zone: no towers from any source |
| Bantawon | 116 | 0 | Dead zone: no towers from any source |
| Bolodbolod | 1,409 | 0 | Dead zone: no towers from any source |
| Cabagawan | 1,691 | 0 | Dead zone: no towers from any source |
| Carnaga | 71 | 0 | Dead zone: no towers from any source |
| Catmon | 1,474 | 0 | Dead zone: no towers from any source |
| Guinsaugon | 111 | 0 | Dead zone: no towers from any source |
| Himatagon (Pob.) | 1,017 | 9 | Crowdsourced signal only (no registered tower) |
| Himbangan | 1,894 | 12 | Crowdsourced signal only (no registered tower) |
| Himos-onan | 684 | 0 | Dead zone: no towers from any source |
| Hinabian | 55 | 0 | Dead zone: no towers from any source |
| Hindag-an | 1,154 | 1 | Crowdsourced signal only (no registered tower) |
| Kauswagan | 373 | 0 | Dead zone: no towers from any source |
| Libas | 82 | 0 | Dead zone: no towers from any source |
| Lipanto | 824 | 1 | Crowdsourced signal only (no registered tower) |
| Magatas | 41 | 0 | Dead zone: no towers from any source |
| Magbagacay | 2,816 | 0 | Dead zone: no towers from any source |
| Mahayag | 622 | 0 | Dead zone: no towers from any source |
| Mahayahay | 1,754 | 0 | Dead zone: no towers from any source |
| Malibago | 870 | 2 | Crowdsourced signal only (no registered tower) |
| Malinao | 78 | 0 | Dead zone: no towers from any source |
| Nueva Esperanza (Cabac-an) | 195 | 0 | Dead zone: no towers from any source |
| Panian | 820 | 1 | Crowdsourced signal only (no registered tower) |
| San Isidro | 1,372 | 0 | Dead zone: no towers from any source |
| Santa Cruz | 320 | 0 | Dead zone: no towers from any source |
| Sug-angon | 99 | 0 | Dead zone: no towers from any source |
| Tabontabon | 560 | 0 | Dead zone: no towers from any source |
| Tambis I | 523 | 0 | Dead zone: no towers from any source |
| Tambis II | 691 | 0 | Dead zone: no towers from any source |