Dumarao comprises 33 barangays with an estimated population of 48,937. 24 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 |
|---|---|---|---|
| Agbatuan | 292 | 0 | Dead zone: no towers from any source |
| Aglalana | 1,439 | 8 | Crowdsourced signal only (no registered tower) |
| Aglanot | 1,863 | 0 | Dead zone: no towers from any source |
| Agsirab | 1,124 | 0 | Dead zone: no towers from any source |
| Alipasiawan | 377 | 0 | Dead zone: no towers from any source |
| Astorga | 2,572 | 0 | Dead zone: no towers from any source |
| Bayog | 215 | 1 | Crowdsourced signal only (no registered tower) |
| Bungsuan | 5,012 | 0 | Dead zone: no towers from any source |
| Calapawan | 921 | 0 | Dead zone: no towers from any source |
| Codingle | 1,327 | 4 | Crowdsourced signal only (no registered tower) |
| Cubi | 772 | 1 | Crowdsourced signal only (no registered tower) |
| Dacuton | 3,147 | 0 | Dead zone: no towers from any source |
| Dangula | 1,378 | 0 | Dead zone: no towers from any source |
| Gibato | 3,196 | 0 | Dead zone: no towers from any source |
| Guinotos | 763 | 0 | Dead zone: no towers from any source |
| Jambad | 408 | 0 | Dead zone: no towers from any source |
| Janguslob | 1,835 | 0 | Dead zone: no towers from any source |
| Lawaan | 1,864 | 0 | Dead zone: no towers from any source |
| Malonoy | 1,248 | 0 | Dead zone: no towers from any source |
| Nagsulang | 1,392 | 0 | Dead zone: no towers from any source |
| Ongol Ilawod | 886 | 0 | Dead zone: no towers from any source |
| Ongol Ilaya | 775 | 6 | Crowdsourced signal only (no registered tower) |
| Poblacion Ilawod | 1,698 | 2 | Crowdsourced signal only (no registered tower) |
| Poblacion Ilaya | 2,564 | 13 | Crowdsourced signal only (no registered tower) |
| Sagrada Familia | 1,628 | 0 | Dead zone: no towers from any source |
| Salcedo | 1,593 | 0 | Dead zone: no towers from any source |
| San Juan | 919 | 2 | Crowdsourced signal only (no registered tower) |
| Sibariwan | 1,250 | 0 | Dead zone: no towers from any source |
| Tamulalod | 693 | 0 | Dead zone: no towers from any source |
| Taslan | 1,008 | 0 | Dead zone: no towers from any source |
| Tina | 1,620 | 0 | Dead zone: no towers from any source |
| Tinaytayan | 1,408 | 5 | Crowdsourced signal only (no registered tower) |
| Traciano | 1,750 | 0 | Dead zone: no towers from any source |