Santa comprises 26 barangays with an estimated population of 18,545. 10 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 |
|---|---|---|---|
| Ampandula | 6,931 | 0 | Dead zone: no towers from any source |
| Banaoang | 1,038 | 8 | Crowdsourced signal only (no registered tower) |
| Basug | 75 | 4 | Crowdsourced signal only (no registered tower) |
| Bucalag | 13 | 0 | Dead zone: no towers from any source |
| Cabangaran | 46 | 1 | Crowdsourced signal only (no registered tower) |
| Calungboyan | 978 | 1 | Crowdsourced signal only (no registered tower) |
| Casiber | 424 | 0 | Dead zone: no towers from any source |
| Dammay | 272 | 0 | Dead zone: no towers from any source |
| Labut Norte | 310 | 0 | Dead zone: no towers from any source |
| Labut Sur | 214 | 9 | Crowdsourced signal only (no registered tower) |
| Mabilbila Norte | 3,729 | 4 | Crowdsourced signal only (no registered tower) |
| Mabilbila Sur | 646 | 6 | Crowdsourced signal only (no registered tower) |
| Magsaysay District (Pob.) | 374 | 11 | Crowdsourced signal only (no registered tower) |
| Manueva | 762 | 11 | Crowdsourced signal only (no registered tower) |
| Marcos (Pob.) | 185 | 3 | Crowdsourced signal only (no registered tower) |
| Nagpanaoan | 1,323 | 5 | Crowdsourced signal only (no registered tower) |
| Namalangan | 32 | 4 | Crowdsourced signal only (no registered tower) |
| Oribi | 94 | 0 | Dead zone: no towers from any source |
| Pasungol | 28 | 0 | Dead zone: no towers from any source |
| Quezon (Pob.) | 85 | 0 | Dead zone: no towers from any source |
| Quirino (Pob.) | 108 | 1 | Crowdsourced signal only (no registered tower) |
| Rancho | 356 | 0 | Dead zone: no towers from any source |
| Rizal | 233 | 9 | Crowdsourced signal only (no registered tower) |
| Sacuyya Norte | 79 | 12 | Crowdsourced signal only (no registered tower) |
| Sacuyya Sur | 29 | 2 | Crowdsourced signal only (no registered tower) |
| Tabucolan | 181 | 0 | Dead zone: no towers from any source |