Santa Cruz comprises 11 barangays with an estimated population of 48,349. 4 of its barangays (36%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Alacaak | 3,224 | 3 | Crowdsourced signal only (no registered tower) |
| Barahan | 9,108 | 0 | Dead zone: no towers from any source |
| Casague | 6,965 | 1 | Crowdsourced signal only (no registered tower) |
| Dayap | 3,971 | 0 | Dead zone: no towers from any source |
| Kurtinganan | 3,598 | 0 | Dead zone: no towers from any source |
| Lumangbayan | 4,263 | 4 | Crowdsourced signal only (no registered tower) |
| Mulawin | 2,701 | 1 | Crowdsourced signal only (no registered tower) |
| Pinagturilan (San Pedro) | 10,262 | 10 | Crowdsourced signal only (no registered tower) |
| Poblacion I (Barangay 1) | 2,032 | 0 | Dead zone: no towers from any source |
| Poblacion II (Barangay 2) | 1,144 | 5 | Crowdsourced signal only (no registered tower) |
| San Vicente | 1,081 | 5 | Crowdsourced signal only (no registered tower) |