Tagbina comprises 25 barangays with an estimated population of 27,734. 21 of its barangays (84%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Batunan | 145 | 0 | Dead zone: no towers from any source |
| Carpenito | 1,676 | 1 | Crowdsourced signal only (no registered tower) |
| Doña Carmen | 497 | 0 | Dead zone: no towers from any source |
| Hinagdanan | 213 | 0 | Dead zone: no towers from any source |
| Kahayagan | 2,213 | 0 | Dead zone: no towers from any source |
| Lago | 652 | 0 | Dead zone: no towers from any source |
| Maglambing | 1,784 | 0 | Dead zone: no towers from any source |
| Maglatab | 977 | 0 | Dead zone: no towers from any source |
| Magsaysay | 585 | 1 | Crowdsourced signal only (no registered tower) |
| Malixi | 1,034 | 0 | Dead zone: no towers from any source |
| Manambia | 586 | 0 | Dead zone: no towers from any source |
| Osmeña | 725 | 0 | Dead zone: no towers from any source |
| Poblacion | 5,691 | 9 | Crowdsourced signal only (no registered tower) |
| Quezon | 657 | 2 | Crowdsourced signal only (no registered tower) |
| San Vicente | 1,025 | 0 | Dead zone: no towers from any source |
| Santa Cruz | 262 | 0 | Dead zone: no towers from any source |
| Santa Fe | 760 | 0 | Dead zone: no towers from any source |
| Santa Juana | 344 | 0 | Dead zone: no towers from any source |
| Santa Maria | 1,613 | 0 | Dead zone: no towers from any source |
| Sayon | 119 | 0 | Dead zone: no towers from any source |
| Soriano | 329 | 0 | Dead zone: no towers from any source |
| Tagongon | 3,214 | 0 | Dead zone: no towers from any source |
| Trinidad | 357 | 0 | Dead zone: no towers from any source |
| Ugoban | 266 | 0 | Dead zone: no towers from any source |
| Villaverde | 2,010 | 0 | Dead zone: no towers from any source |