Santa Cruz comprises 25 barangays with an estimated population of 61,565. 14 of its barangays (56%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Babuyan | 426 | 0 | Dead zone: no towers from any source |
| Bangcol | 805 | 0 | Dead zone: no towers from any source |
| Bayto | 1,276 | 6 | Crowdsourced signal only (no registered tower) |
| Biay | 2,876 | 2 | Crowdsourced signal only (no registered tower) |
| Bolitoc | 2,643 | 0 | Dead zone: no towers from any source |
| Bulawon | 1,660 | 0 | Dead zone: no towers from any source |
| Canaynayan | 1,505 | 0 | Dead zone: no towers from any source |
| Gama | 4,693 | 2 | Crowdsourced signal only (no registered tower) |
| Guinabon | 4,318 | 0 | Dead zone: no towers from any source |
| Guisguis | 1,915 | 0 | Dead zone: no towers from any source |
| Lipay | 4,522 | 4 | Crowdsourced signal only (no registered tower) |
| Lomboy | 999 | 0 | Dead zone: no towers from any source |
| Lucapon North | 2,446 | 8 | Crowdsourced signal only (no registered tower) |
| Lucapon South | 2,908 | 2 | Crowdsourced signal only (no registered tower) |
| Malabago | 2,897 | 3 | Crowdsourced signal only (no registered tower) |
| Naulo | 1,828 | 1 | Crowdsourced signal only (no registered tower) |
| Pagatpat | 3,841 | 1 | Crowdsourced signal only (no registered tower) |
| Pamonoran | 2,699 | 0 | Dead zone: no towers from any source |
| Poblacion North | 1,180 | 2 | Crowdsourced signal only (no registered tower) |
| Poblacion South | 1,463 | 0 | Dead zone: no towers from any source |
| Sabang | 741 | 0 | Dead zone: no towers from any source |
| San Fernando | 4,727 | 0 | Dead zone: no towers from any source |
| Tabalong | 958 | 0 | Dead zone: no towers from any source |
| Tubotubo North | 3,855 | 0 | Dead zone: no towers from any source |
| Tubotubo South | 4,384 | 1 | Crowdsourced signal only (no registered tower) |