San Fernando comprises 26 barangays with an estimated population of 27,737. 26 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 |
|---|---|---|---|
| Altavista | 394 | 0 | Dead zone: no towers from any source |
| Bayanihan Pob. (District 4) | 4,267 | 0 | Dead zone: no towers from any source |
| Baybaydagat Pob. (District 1) | 1,000 | 0 | Dead zone: no towers from any source |
| Benitinan | 304 | 0 | Dead zone: no towers from any source |
| Buenasuerte | 626 | 0 | Dead zone: no towers from any source |
| Buenavista | 984 | 0 | Dead zone: no towers from any source |
| Buenos Aires | 1,501 | 0 | Dead zone: no towers from any source |
| Buyo | 415 | 0 | Dead zone: no towers from any source |
| Cañelas | 689 | 0 | Dead zone: no towers from any source |
| Corbada | 1,544 | 0 | Dead zone: no towers from any source |
| Daplian | 431 | 0 | Dead zone: no towers from any source |
| Del Rosario | 662 | 0 | Dead zone: no towers from any source |
| Ipil | 311 | 0 | Dead zone: no towers from any source |
| Lahong | 134 | 0 | Dead zone: no towers from any source |
| Lumbia | 529 | 0 | Dead zone: no towers from any source |
| Magkaipit | 1,321 | 0 | Dead zone: no towers from any source |
| Magsasaka Pob. (District 3) | 2,793 | 0 | Dead zone: no towers from any source |
| Minio | 1,230 | 0 | Dead zone: no towers from any source |
| Pinamoghaan | 360 | 0 | Dead zone: no towers from any source |
| Progreso | 2,635 | 0 | Dead zone: no towers from any source |
| Resurreccion | 1,803 | 0 | Dead zone: no towers from any source |
| Salvacion | 221 | 0 | Dead zone: no towers from any source |
| Silangan Pob. (District 2) | 555 | 0 | Dead zone: no towers from any source |
| Sowa | 878 | 0 | Dead zone: no towers from any source |
| Talisay | 795 | 0 | Dead zone: no towers from any source |
| Valparaiso | 1,355 | 0 | Dead zone: no towers from any source |