Mallig comprises 18 barangays with an estimated population of 25,114. 13 of its barangays (72%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Binmonton | 378 | 0 | Dead zone: no towers from any source |
| Casili | 1,406 | 0 | Dead zone: no towers from any source |
| Centro I (Pob.) | 1,514 | 2 | Crowdsourced signal only (no registered tower) |
| Centro II (Pob.) | 417 | 1 | Crowdsourced signal only (no registered tower) |
| Holy Friday | 867 | 0 | Dead zone: no towers from any source |
| Maligaya | 3,721 | 1 | Crowdsourced signal only (no registered tower) |
| Manano | 515 | 0 | Dead zone: no towers from any source |
| Olango | 3,021 | 0 | Dead zone: no towers from any source |
| Rang-ayan | 2,645 | 0 | Dead zone: no towers from any source |
| San Jose Norte I | 1,852 | 0 | Dead zone: no towers from any source |
| San Jose Norte II | 868 | 0 | Dead zone: no towers from any source |
| San Jose Sur | 1,305 | 0 | Dead zone: no towers from any source |
| San Pedro (Barucbuc Sur) | 2,466 | 1 | Crowdsourced signal only (no registered tower) |
| San Ramon | 1,632 | 0 | Dead zone: no towers from any source |
| Siempre Viva Norte | 388 | 0 | Dead zone: no towers from any source |
| Siempre Viva Sur | 429 | 0 | Dead zone: no towers from any source |
| Trinidad | 442 | 0 | Dead zone: no towers from any source |
| Victoria | 1,248 | 3 | Crowdsourced signal only (no registered tower) |