Aliaga comprises 26 barangays with an estimated population of 46,863. 11 of its barangays (42%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Betes | 2,252 | 0 | Dead zone: no towers from any source |
| Bibiclat | 6,484 | 3 | Crowdsourced signal only (no registered tower) |
| Bucot | 5,543 | 6 | Crowdsourced signal only (no registered tower) |
| La Purisima | 739 | 0 | Dead zone: no towers from any source |
| Macabucod | 1,207 | 2 | Crowdsourced signal only (no registered tower) |
| Magsaysay | 1,516 | 1 | Crowdsourced signal only (no registered tower) |
| Pantoc | 805 | 2 | Crowdsourced signal only (no registered tower) |
| Poblacion Centro | 624 | 0 | Dead zone: no towers from any source |
| Poblacion East I | 2,346 | 0 | Dead zone: no towers from any source |
| Poblacion East II | 1,183 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion West III | 405 | 0 | Dead zone: no towers from any source |
| Poblacion West IV | 287 | 1 | Crowdsourced signal only (no registered tower) |
| San Carlos | 3,204 | 0 | Dead zone: no towers from any source |
| San Emiliano | 1,439 | 1 | Crowdsourced signal only (no registered tower) |
| San Eustacio | 614 | 1 | Crowdsourced signal only (no registered tower) |
| San Felipe Bata | 1,706 | 0 | Dead zone: no towers from any source |
| San Felipe Matanda | 973 | 1 | Crowdsourced signal only (no registered tower) |
| San Juan | 3,574 | 4 | Crowdsourced signal only (no registered tower) |
| San Pablo Bata | 896 | 2 | Crowdsourced signal only (no registered tower) |
| San Pablo Matanda | 1,905 | 0 | Dead zone: no towers from any source |
| Santa Monica | 894 | 0 | Dead zone: no towers from any source |
| Santiago | 1,289 | 0 | Dead zone: no towers from any source |
| Santo Rosario | 1,818 | 2 | Crowdsourced signal only (no registered tower) |
| Santo Tomas | 3,016 | 3 | Crowdsourced signal only (no registered tower) |
| Sunson | 701 | 0 | Dead zone: no towers from any source |
| Umangan | 1,443 | 3 | Crowdsourced signal only (no registered tower) |