Madalum comprises 37 barangays with an estimated population of 39,485. 37 of its barangays (100%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Abaga | 1,046 | 0 | Dead zone: no towers from any source |
| Bacayawan | 3,906 | 0 | Dead zone: no towers from any source |
| Bagoaingud | 493 | 0 | Dead zone: no towers from any source |
| Basak | 1,383 | 0 | Dead zone: no towers from any source |
| Bato | 159 | 0 | Dead zone: no towers from any source |
| Bubong | 303 | 0 | Dead zone: no towers from any source |
| Cabasaran | 11,810 | 0 | Dead zone: no towers from any source |
| Cadayonan | 276 | 0 | Dead zone: no towers from any source |
| Dandamun | 193 | 0 | Dead zone: no towers from any source |
| Delausan | 86 | 0 | Dead zone: no towers from any source |
| Diampaca | 257 | 0 | Dead zone: no towers from any source |
| Dibarosan | 296 | 0 | Dead zone: no towers from any source |
| Gadongan | 136 | 0 | Dead zone: no towers from any source |
| Gurain | 476 | 0 | Dead zone: no towers from any source |
| Kormatan | 23 | 0 | Dead zone: no towers from any source |
| Liangan | 555 | 0 | Dead zone: no towers from any source |
| Liangan I | 583 | 0 | Dead zone: no towers from any source |
| Lilitun | 743 | 0 | Dead zone: no towers from any source |
| Linao | 61 | 0 | Dead zone: no towers from any source |
| Linuk | 437 | 0 | Dead zone: no towers from any source |
| Lumbac | 87 | 0 | Dead zone: no towers from any source |
| Madaya | 807 | 0 | Dead zone: no towers from any source |
| Padian Torogan I | 0 | 0 | Dead zone: no towers from any source |
| Pagayawan | 156 | 0 | Dead zone: no towers from any source |
| Paridi-Kalimodan | 37 | 0 | Dead zone: no towers from any source |
| Poblacion | 203 | 0 | Dead zone: no towers from any source |
| Punud | 881 | 0 | Dead zone: no towers from any source |
| Racotan | 687 | 0 | Dead zone: no towers from any source |
| Raya | 2,784 | 0 | Dead zone: no towers from any source |
| Riray | 5,525 | 0 | Dead zone: no towers from any source |
| Sabanding | 172 | 0 | Dead zone: no towers from any source |
| Salongabanding | 843 | 0 | Dead zone: no towers from any source |
| Sogod Kaloy | 211 | 0 | Dead zone: no towers from any source |
| Sugod | 145 | 0 | Dead zone: no towers from any source |
| Tamporong | 1,213 | 0 | Dead zone: no towers from any source |
| Tongantongan | 940 | 0 | Dead zone: no towers from any source |
| Udangun | 1,572 | 0 | Dead zone: no towers from any source |