San Francisco comprises 22 barangays with an estimated population of 11,534. 17 of its barangays (77%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Anislagon | 300 | 1 | Crowdsourced signal only (no registered tower) |
| Bongawisan | 624 | 0 | Dead zone: no towers from any source |
| Bongbong | 514 | 0 | Dead zone: no towers from any source |
| Cahayag | 407 | 0 | Dead zone: no towers from any source |
| Causi | 37 | 1 | Crowdsourced signal only (no registered tower) |
| Central (Pob.) | 219 | 2 | Crowdsourced signal only (no registered tower) |
| Dakit (Pob.) | 206 | 0 | Dead zone: no towers from any source |
| Gabi | 52 | 0 | Dead zone: no towers from any source |
| Habay | 384 | 0 | Dead zone: no towers from any source |
| Malico | 61 | 0 | Dead zone: no towers from any source |
| Marayag | 194 | 0 | Dead zone: no towers from any source |
| Napantao | 1,023 | 0 | Dead zone: no towers from any source |
| Pasanon | 965 | 0 | Dead zone: no towers from any source |
| Pinamudlan | 415 | 1 | Crowdsourced signal only (no registered tower) |
| Punta | 153 | 1 | Crowdsourced signal only (no registered tower) |
| Santa Cruz | 1,652 | 0 | Dead zone: no towers from any source |
| Santa Paz Norte | 806 | 0 | Dead zone: no towers from any source |
| Santa Paz Sur | 162 | 0 | Dead zone: no towers from any source |
| Sudmon | 1,090 | 0 | Dead zone: no towers from any source |
| Tinaan | 436 | 0 | Dead zone: no towers from any source |
| Tuno | 1,470 | 0 | Dead zone: no towers from any source |
| Ubos (Pob.) | 364 | 0 | Dead zone: no towers from any source |