Biliran comprises 11 barangays with an estimated population of 17,134. 8 of its barangays (73%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bato | 1,443 | 5 | Crowdsourced signal only (no registered tower) |
| Burabod | 3,064 | 4 | Crowdsourced signal only (no registered tower) |
| Busali | 1,233 | 0 | Dead zone: no towers from any source |
| Canila | 1,816 | 0 | Dead zone: no towers from any source |
| Hugpa | 1,298 | 0 | Dead zone: no towers from any source |
| Julita | 1,455 | 0 | Dead zone: no towers from any source |
| Pinangumhan | 891 | 0 | Dead zone: no towers from any source |
| San Isidro (Pob.) | 3,224 | 2 | Crowdsourced signal only (no registered tower) |
| San Roque (Pob.) | 1,271 | 0 | Dead zone: no towers from any source |
| Sanggalang | 1,044 | 0 | Dead zone: no towers from any source |
| Villa Enage (Baras) | 395 | 0 | Dead zone: no towers from any source |