San Miguel comprises 24 barangays with an estimated population of 19,672. 24 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 |
|---|---|---|---|
| Atsan (District I) | 872 | 0 | Dead zone: no towers from any source |
| Balatohan | 282 | 0 | Dead zone: no towers from any source |
| Boton | 532 | 0 | Dead zone: no towers from any source |
| Buhi | 609 | 0 | Dead zone: no towers from any source |
| Dayawa | 274 | 0 | Dead zone: no towers from any source |
| J. M. Alberto | 1,841 | 0 | Dead zone: no towers from any source |
| Katipunan | 1,073 | 0 | Dead zone: no towers from any source |
| Kilikilihan | 1,650 | 0 | Dead zone: no towers from any source |
| Mabato | 697 | 0 | Dead zone: no towers from any source |
| Obo | 640 | 0 | Dead zone: no towers from any source |
| Pacogon | 127 | 0 | Dead zone: no towers from any source |
| Pagsangahan | 493 | 0 | Dead zone: no towers from any source |
| Pangilao | 383 | 0 | Dead zone: no towers from any source |
| Paraiso | 1,752 | 0 | Dead zone: no towers from any source |
| Poblacion District II | 637 | 0 | Dead zone: no towers from any source |
| Poblacion District III | 1,306 | 0 | Dead zone: no towers from any source |
| Progreso | 1,408 | 0 | Dead zone: no towers from any source |
| Salvacion (Patagan) | 848 | 0 | Dead zone: no towers from any source |
| San Juan (Aroyao) | 975 | 0 | Dead zone: no towers from any source |
| San Marcos | 1,492 | 0 | Dead zone: no towers from any source |
| Santa Elena (Patagan) | 251 | 0 | Dead zone: no towers from any source |
| Siay | 567 | 0 | Dead zone: no towers from any source |
| Solong | 604 | 0 | Dead zone: no towers from any source |
| Tobrehon | 359 | 0 | Dead zone: no towers from any source |