Rosario comprises 20 barangays with an estimated population of 72,727. 8 of its barangays (40%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bagbag I | 3,491 | 4 | Crowdsourced signal only (no registered tower) |
| Bagbag II | 8,730 | 5 | Crowdsourced signal only (no registered tower) |
| Kanluran | 1,373 | 0 | Dead zone: no towers from any source |
| Ligtong I | 758 | 0 | Dead zone: no towers from any source |
| Ligtong II | 1,436 | 3 | Crowdsourced signal only (no registered tower) |
| Ligtong III | 4,106 | 8 | Crowdsourced signal only (no registered tower) |
| Ligtong IV | 421 | 0 | Dead zone: no towers from any source |
| Muzon I | 3,486 | 0 | Dead zone: no towers from any source |
| Muzon II | 1,805 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion | 2,936 | 5 | Crowdsourced signal only (no registered tower) |
| Sapa I | 790 | 2 | Crowdsourced signal only (no registered tower) |
| Sapa II | 1,316 | 0 | Dead zone: no towers from any source |
| Sapa III | 475 | 0 | Dead zone: no towers from any source |
| Sapa IV | 309 | 0 | Dead zone: no towers from any source |
| Silangan I | 1,236 | 2 | Crowdsourced signal only (no registered tower) |
| Silangan II | 941 | 3 | Crowdsourced signal only (no registered tower) |
| Tejeros Convention | 24,427 | 58 | Crowdsourced signal only (no registered tower) |
| Wawa I | 6,987 | 4 | Crowdsourced signal only (no registered tower) |
| Wawa II | 2,622 | 0 | Dead zone: no towers from any source |
| Wawa III | 5,082 | 4 | Crowdsourced signal only (no registered tower) |