San Juan (Lapog) comprises 32 barangays with an estimated population of 29,706. 22 of its barangays (69%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Asilang | 399 | 0 | Dead zone: no towers from any source |
| Bacsil | 1,204 | 3 | Crowdsourced signal only (no registered tower) |
| Baliw | 912 | 3 | Crowdsourced signal only (no registered tower) |
| Bannuar (Pob.) | 2,436 | 2 | Crowdsourced signal only (no registered tower) |
| Barbar | 1,805 | 0 | Dead zone: no towers from any source |
| Cabanglotan | 1,175 | 0 | Dead zone: no towers from any source |
| Cacandongan | 363 | 0 | Dead zone: no towers from any source |
| Camanggaan | 604 | 0 | Dead zone: no towers from any source |
| Camindoroan | 515 | 0 | Dead zone: no towers from any source |
| Caronoan | 1,013 | 0 | Dead zone: no towers from any source |
| Darao | 556 | 0 | Dead zone: no towers from any source |
| Dardarat | 454 | 0 | Dead zone: no towers from any source |
| Guimod Norte | 632 | 1 | Crowdsourced signal only (no registered tower) |
| Guimod Sur | 1,121 | 5 | Crowdsourced signal only (no registered tower) |
| Immayos Norte | 619 | 2 | Crowdsourced signal only (no registered tower) |
| Immayos Sur | 204 | 4 | Crowdsourced signal only (no registered tower) |
| Labnig | 1,263 | 0 | Dead zone: no towers from any source |
| Lapting | 1,126 | 9 | Crowdsourced signal only (no registered tower) |
| Lira (Pob.) | 653 | 0 | Dead zone: no towers from any source |
| Malamin | 751 | 0 | Dead zone: no towers from any source |
| Muraya | 653 | 0 | Dead zone: no towers from any source |
| Nagsabaran | 1,336 | 0 | Dead zone: no towers from any source |
| Nagsupotan | 1,820 | 0 | Dead zone: no towers from any source |
| Pandayan (Pob.) | 677 | 3 | Crowdsourced signal only (no registered tower) |
| Refaro | 1,739 | 0 | Dead zone: no towers from any source |
| Resurreccion (Pob.) | 936 | 4 | Crowdsourced signal only (no registered tower) |
| Sabangan | 661 | 0 | Dead zone: no towers from any source |
| San Isidro | 1,195 | 0 | Dead zone: no towers from any source |
| Saoang | 716 | 0 | Dead zone: no towers from any source |
| Solotsolot | 860 | 0 | Dead zone: no towers from any source |
| Sunggiam | 1,013 | 0 | Dead zone: no towers from any source |
| Surngit | 295 | 0 | Dead zone: no towers from any source |