San Juan (Cabalian) comprises 18 barangays with an estimated population of 11,670. 16 of its barangays (89%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Agay-ay | 480 | 0 | Dead zone: no towers from any source |
| Basak | 1,146 | 0 | Dead zone: no towers from any source |
| Bobon A | 183 | 0 | Dead zone: no towers from any source |
| Bobon B | 119 | 0 | Dead zone: no towers from any source |
| Dayanog | 1,071 | 0 | Dead zone: no towers from any source |
| Garrido | 866 | 0 | Dead zone: no towers from any source |
| Minoyho | 853 | 0 | Dead zone: no towers from any source |
| Osao | 1,359 | 1 | Crowdsourced signal only (no registered tower) |
| Pong-oy | 623 | 1 | Crowdsourced signal only (no registered tower) |
| San Jose (Pob.) | 521 | 0 | Dead zone: no towers from any source |
| San Roque | 415 | 0 | Dead zone: no towers from any source |
| San Vicente | 315 | 0 | Dead zone: no towers from any source |
| Santa Cruz (Pob.) | 794 | 0 | Dead zone: no towers from any source |
| Santa Filomena | 377 | 0 | Dead zone: no towers from any source |
| Santo Niño (Pob.) | 587 | 0 | Dead zone: no towers from any source |
| Somoje | 635 | 0 | Dead zone: no towers from any source |
| Sua | 852 | 0 | Dead zone: no towers from any source |
| Timba | 474 | 0 | Dead zone: no towers from any source |