Rosario comprises 11 barangays with an estimated population of 76,675. 5 of its barangays (45%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bayugan 3 | 18,253 | 18 | Crowdsourced signal only (no registered tower) |
| Cabantao | 5,814 | 0 | Dead zone: no towers from any source |
| Cabawan | 1,850 | 0 | Dead zone: no towers from any source |
| Libuac | 5,573 | 0 | Dead zone: no towers from any source |
| Maligaya | 1,156 | 0 | Dead zone: no towers from any source |
| Marfil | 460 | 0 | Dead zone: no towers from any source |
| Novele | 3,949 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion | 9,225 | 6 | Crowdsourced signal only (no registered tower) |
| Santa Cruz | 11,942 | 6 | Crowdsourced signal only (no registered tower) |
| Tagbayagan | 6,522 | 1 | Crowdsourced signal only (no registered tower) |
| Wasi-an | 11,931 | 3 | Crowdsourced signal only (no registered tower) |