Santa Magdalena comprises 14 barangays with an estimated population of 17,798. 13 of its barangays (93%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Barangay Poblacion I | 229 | 0 | Dead zone: no towers from any source |
| Barangay Poblacion II | 51 | 0 | Dead zone: no towers from any source |
| Barangay Poblacion III | 402 | 4 | Crowdsourced signal only (no registered tower) |
| Barangay Poblacion IV | 966 | 0 | Dead zone: no towers from any source |
| La Esperanza | 577 | 0 | Dead zone: no towers from any source |
| Peñafrancia | 1,183 | 0 | Dead zone: no towers from any source |
| Salvacion | 1,603 | 0 | Dead zone: no towers from any source |
| San Antonio | 2,320 | 0 | Dead zone: no towers from any source |
| San Bartolome (Talaongan) | 2,385 | 0 | Dead zone: no towers from any source |
| San Eugenio | 2,274 | 0 | Dead zone: no towers from any source |
| San Isidro | 1,588 | 0 | Dead zone: no towers from any source |
| San Rafael | 2,393 | 0 | Dead zone: no towers from any source |
| San Roque | 1,328 | 0 | Dead zone: no towers from any source |
| San Sebastian | 499 | 0 | Dead zone: no towers from any source |