Mangaldan comprises 30 barangays with an estimated population of 136,965. 13 of its barangays (43%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Alitaya | 8,777 | 1 | Crowdsourced signal only (no registered tower) |
| Amansabina | 2,778 | 0 | Dead zone: no towers from any source |
| Anolid | 7,971 | 12 | Verified coverage (NTC + crowdsourced) |
| Banaoang | 8,393 | 3 | Crowdsourced signal only (no registered tower) |
| Bantayan | 3,070 | 2 | Crowdsourced signal only (no registered tower) |
| Bari | 5,637 | 1 | Crowdsourced signal only (no registered tower) |
| Bateng | 2,835 | 0 | Dead zone: no towers from any source |
| Buenlag | 4,539 | 0 | Dead zone: no towers from any source |
| David | 5,451 | 4 | Crowdsourced signal only (no registered tower) |
| Embarcadero | 2,463 | 2 | Crowdsourced signal only (no registered tower) |
| Gueguesangen | 2,464 | 0 | Dead zone: no towers from any source |
| Guesang | 8,858 | 0 | Dead zone: no towers from any source |
| Guiguilonen | 2,565 | 1 | Crowdsourced signal only (no registered tower) |
| Guilig | 2,564 | 0 | Dead zone: no towers from any source |
| Inlambo | 1,200 | 0 | Dead zone: no towers from any source |
| Lanas | 5,264 | 0 | Dead zone: no towers from any source |
| Landas | 1,830 | 0 | Dead zone: no towers from any source |
| Maasin | 4,495 | 1 | Crowdsourced signal only (no registered tower) |
| Macayug | 5,428 | 1 | Crowdsourced signal only (no registered tower) |
| Malabago | 5,735 | 13 | Crowdsourced signal only (no registered tower) |
| Navaluan | 5,877 | 1 | Crowdsourced signal only (no registered tower) |
| Nibaliw | 3,396 | 8 | Crowdsourced signal only (no registered tower) |
| Osiem | 5,723 | 0 | Dead zone: no towers from any source |
| Palua | 2,261 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion | 5,931 | 7 | Crowdsourced signal only (no registered tower) |
| Pogo | 814 | 3 | Crowdsourced signal only (no registered tower) |
| Salaan | 4,866 | 0 | Dead zone: no towers from any source |
| Salay | 7,260 | 1 | Crowdsourced signal only (no registered tower) |
| Talogtog | 4,323 | 0 | Dead zone: no towers from any source |
| Tebag | 4,197 | 0 | Dead zone: no towers from any source |