Dumangas comprises 45 barangays with an estimated population of 75,495. 30 of its barangays (67%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Aurora-del Pilar (Pob.) | 25 | 0 | Dead zone: no towers from any source |
| Bacay | 1,575 | 4 | Crowdsourced signal only (no registered tower) |
| Bacong | 1,366 | 0 | Dead zone: no towers from any source |
| Balabag | 1,840 | 1 | Crowdsourced signal only (no registered tower) |
| Balud | 972 | 0 | Dead zone: no towers from any source |
| Bantud | 646 | 0 | Dead zone: no towers from any source |
| Bantud Fabrica | 3,246 | 6 | Crowdsourced signal only (no registered tower) |
| Baras | 262 | 0 | Dead zone: no towers from any source |
| Barasan | 1,246 | 0 | Dead zone: no towers from any source |
| Basa-Mabini Bonifacio (Pob.) | 462 | 0 | Dead zone: no towers from any source |
| Bolilao | 2,093 | 0 | Dead zone: no towers from any source |
| Buenaflor Embarkadero (Pob.) | 371 | 0 | Dead zone: no towers from any source |
| Burgos-Regidor (Pob.) | 647 | 0 | Dead zone: no towers from any source |
| Calao | 1,965 | 0 | Dead zone: no towers from any source |
| Cali | 3,444 | 0 | Dead zone: no towers from any source |
| Cansilayan | 1,763 | 0 | Dead zone: no towers from any source |
| Capaliz | 685 | 0 | Dead zone: no towers from any source |
| Cayos | 885 | 0 | Dead zone: no towers from any source |
| Compayan | 449 | 0 | Dead zone: no towers from any source |
| Dacutan | 1,860 | 3 | Crowdsourced signal only (no registered tower) |
| Ermita | 2,298 | 7 | Crowdsourced signal only (no registered tower) |
| Ilaya 1st | 1,491 | 1 | Crowdsourced signal only (no registered tower) |
| Ilaya 2nd | 533 | 0 | Dead zone: no towers from any source |
| Ilaya 3rd | 650 | 0 | Dead zone: no towers from any source |
| Jardin | 339 | 0 | Dead zone: no towers from any source |
| Lacturan | 2,690 | 0 | Dead zone: no towers from any source |
| Lopez Jaena - Rizal (Pob.) | 60 | 0 | Dead zone: no towers from any source |
| Managuit | 552 | 0 | Dead zone: no towers from any source |
| Maquina | 1,269 | 1 | Crowdsourced signal only (no registered tower) |
| Nanding Lopez | 2,902 | 0 | Dead zone: no towers from any source |
| Pagdugue | 3,481 | 4 | Crowdsourced signal only (no registered tower) |
| Paloc Bigque | 1,401 | 16 | Crowdsourced signal only (no registered tower) |
| Paloc Sool | 2,682 | 0 | Dead zone: no towers from any source |
| Patlad | 3,006 | 2 | Crowdsourced signal only (no registered tower) |
| Pd Monfort North (Lublub) | 5,781 | 1 | Crowdsourced signal only (no registered tower) |
| Pd Monfort South (Guinsampanan) | 1,791 | 0 | Dead zone: no towers from any source |
| Pulao | 2,392 | 1 | Crowdsourced signal only (no registered tower) |
| Rosario | 2,383 | 1 | Crowdsourced signal only (no registered tower) |
| Sapao | 2,335 | 8 | Crowdsourced signal only (no registered tower) |
| Sulangan | 3,337 | 0 | Dead zone: no towers from any source |
| Tabucan | 3,830 | 0 | Dead zone: no towers from any source |
| Talusan | 543 | 0 | Dead zone: no towers from any source |
| Tambobo | 870 | 0 | Dead zone: no towers from any source |
| Tamboilan | 2,276 | 1 | Crowdsourced signal only (no registered tower) |
| Victorias | 801 | 0 | Dead zone: no towers from any source |