Malalag comprises 15 barangays with an estimated population of 30,426. 9 of its barangays (60%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bagumbayan | 723 | 0 | Dead zone: no towers from any source |
| Baybay | 2,389 | 0 | Dead zone: no towers from any source |
| Bolton | 4,339 | 4 | Crowdsourced signal only (no registered tower) |
| Bulacan | 6,727 | 4 | Crowdsourced signal only (no registered tower) |
| Caputian | 1,710 | 0 | Dead zone: no towers from any source |
| Ibo | 1,127 | 0 | Dead zone: no towers from any source |
| Kiblagon | 255 | 1 | Crowdsourced signal only (no registered tower) |
| Lapu-Lapu (Lapla) | 58 | 0 | Dead zone: no towers from any source |
| Mabini | 554 | 0 | Dead zone: no towers from any source |
| New Baclayon | 2,214 | 3 | Crowdsourced signal only (no registered tower) |
| Pitu | 951 | 0 | Dead zone: no towers from any source |
| Poblacion | 7,603 | 1 | Crowdsourced signal only (no registered tower) |
| Rizal (Parame) | 71 | 0 | Dead zone: no towers from any source |
| San Isidro | 93 | 0 | Dead zone: no towers from any source |
| Tagansule | 1,612 | 7 | Crowdsourced signal only (no registered tower) |