Rosario comprises 33 barangays with an estimated population of 70,277. 7 of its barangays (21%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Alipang | 2,235 | 18 | Crowdsourced signal only (no registered tower) |
| Ambangonan | 2,184 | 4 | Crowdsourced signal only (no registered tower) |
| Amlang | 3,212 | 7 | Crowdsourced signal only (no registered tower) |
| Bacani | 2,122 | 0 | Dead zone: no towers from any source |
| Bangar | 285 | 3 | Crowdsourced signal only (no registered tower) |
| Bani | 1,144 | 0 | Dead zone: no towers from any source |
| Benteng-Sapilang | 1,681 | 3 | Crowdsourced signal only (no registered tower) |
| Cadumanian | 1,135 | 0 | Dead zone: no towers from any source |
| Camp One | 1,268 | 15 | Crowdsourced signal only (no registered tower) |
| Carunuan East | 1,448 | 0 | Dead zone: no towers from any source |
| Carunuan West | 1,331 | 0 | Dead zone: no towers from any source |
| Casilagan | 482 | 7 | Crowdsourced signal only (no registered tower) |
| Cataguingtingan | 2,800 | 6 | Crowdsourced signal only (no registered tower) |
| Concepcion | 3,090 | 7 | Crowdsourced signal only (no registered tower) |
| Damortis | 1,904 | 2 | Crowdsourced signal only (no registered tower) |
| Gumot-Nagcolaran | 965 | 1 | Crowdsourced signal only (no registered tower) |
| Inabaan Norte | 4,799 | 2 | Crowdsourced signal only (no registered tower) |
| Inabaan Sur | 1,418 | 6 | Crowdsourced signal only (no registered tower) |
| Marcos | 2,641 | 0 | Dead zone: no towers from any source |
| Nagtagaan | 2,408 | 11 | Crowdsourced signal only (no registered tower) |
| Nangcamotian | 2,785 | 1 | Crowdsourced signal only (no registered tower) |
| Parasapas | 3,252 | 0 | Dead zone: no towers from any source |
| Poblacion East | 655 | 7 | Crowdsourced signal only (no registered tower) |
| Poblacion West | 2,741 | 3 | Crowdsourced signal only (no registered tower) |
| Puzon | 930 | 1 | Crowdsourced signal only (no registered tower) |
| Rabon | 2,206 | 3 | Crowdsourced signal only (no registered tower) |
| San Jose | 723 | 2 | Crowdsourced signal only (no registered tower) |
| Subusub | 4,079 | 14 | Crowdsourced signal only (no registered tower) |
| Tabtabungao | 2,176 | 4 | Crowdsourced signal only (no registered tower) |
| Tanglag | 1,270 | 1 | Crowdsourced signal only (no registered tower) |
| Tay-ac | 4,470 | 1 | Crowdsourced signal only (no registered tower) |
| Udiao | 691 | 15 | Crowdsourced signal only (no registered tower) |
| Vila | 5,747 | 1 | Crowdsourced signal only (no registered tower) |