San Joaquin comprises 85 barangays with an estimated population of 52,199. 69 of its barangays (81%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Amboyu-an | 945 | 0 | Dead zone: no towers from any source |
| Andres Bonifacio | 505 | 0 | Dead zone: no towers from any source |
| Antalon | 533 | 0 | Dead zone: no towers from any source |
| Bad-as | 299 | 0 | Dead zone: no towers from any source |
| Bagumbayan | 692 | 0 | Dead zone: no towers from any source |
| Balabago | 1,036 | 0 | Dead zone: no towers from any source |
| Baybay | 828 | 1 | Crowdsourced signal only (no registered tower) |
| Bayunan (Panday Oro) | 670 | 0 | Dead zone: no towers from any source |
| Bolbogan | 713 | 0 | Dead zone: no towers from any source |
| Bonga | 538 | 2 | Crowdsourced signal only (no registered tower) |
| Bucaya | 1,615 | 1 | Crowdsourced signal only (no registered tower) |
| Bulho | 562 | 0 | Dead zone: no towers from any source |
| Cadluman | 202 | 0 | Dead zone: no towers from any source |
| Cadoldolan | 442 | 0 | Dead zone: no towers from any source |
| Camaba-an | 252 | 0 | Dead zone: no towers from any source |
| Camia | 398 | 0 | Dead zone: no towers from any source |
| Cata-an | 952 | 0 | Dead zone: no towers from any source |
| Crossing Dapuyan | 1,105 | 4 | Crowdsourced signal only (no registered tower) |
| Cubay | 526 | 0 | Dead zone: no towers from any source |
| Cumarascas | 335 | 0 | Dead zone: no towers from any source |
| Dacdacanan | 557 | 0 | Dead zone: no towers from any source |
| Danawan | 353 | 0 | Dead zone: no towers from any source |
| Doldol | 378 | 0 | Dead zone: no towers from any source |
| Dongoc | 974 | 0 | Dead zone: no towers from any source |
| Escalantera | 835 | 3 | Crowdsourced signal only (no registered tower) |
| Ginot-an | 848 | 0 | Dead zone: no towers from any source |
| Guibongan Bayunan | 503 | 4 | Crowdsourced signal only (no registered tower) |
| Huna | 308 | 0 | Dead zone: no towers from any source |
| Igbaje | 218 | 0 | Dead zone: no towers from any source |
| Igbangcal | 447 | 0 | Dead zone: no towers from any source |
| Igbinangon | 320 | 0 | Dead zone: no towers from any source |
| Igburi | 549 | 0 | Dead zone: no towers from any source |
| Igcabutong | 255 | 0 | Dead zone: no towers from any source |
| Igcadlum | 331 | 0 | Dead zone: no towers from any source |
| Igcaphang | 171 | 0 | Dead zone: no towers from any source |
| Igcaratong | 765 | 0 | Dead zone: no towers from any source |
| Igcondao | 475 | 1 | Crowdsourced signal only (no registered tower) |
| Igcores | 622 | 0 | Dead zone: no towers from any source |
| Igdagmay | 264 | 0 | Dead zone: no towers from any source |
| Igdomingding | 245 | 0 | Dead zone: no towers from any source |
| Iglilico | 363 | 0 | Dead zone: no towers from any source |
| Igpayong | 169 | 0 | Dead zone: no towers from any source |
| Jawod | 628 | 0 | Dead zone: no towers from any source |
| Langca | 519 | 0 | Dead zone: no towers from any source |
| Languanan | 454 | 0 | Dead zone: no towers from any source |
| Lawigan | 2,218 | 3 | Crowdsourced signal only (no registered tower) |
| Lomboy | 438 | 0 | Dead zone: no towers from any source |
| Lomboyan (Santa Ana) | 477 | 1 | Crowdsourced signal only (no registered tower) |
| Lopez Vito | 590 | 1 | Crowdsourced signal only (no registered tower) |
| Mabini Norte | 328 | 0 | Dead zone: no towers from any source |
| Mabini Sur | 638 | 0 | Dead zone: no towers from any source |
| Manhara | 225 | 7 | Crowdsourced signal only (no registered tower) |
| Maninila | 251 | 0 | Dead zone: no towers from any source |
| Masagud | 598 | 0 | Dead zone: no towers from any source |
| Matambog | 692 | 0 | Dead zone: no towers from any source |
| Mayunoc | 392 | 0 | Dead zone: no towers from any source |
| Montinola | 695 | 0 | Dead zone: no towers from any source |
| Nadsadan | 541 | 0 | Dead zone: no towers from any source |
| Nagquirisan | 273 | 0 | Dead zone: no towers from any source |
| Nagsipit | 527 | 0 | Dead zone: no towers from any source |
| New Gumawan | 444 | 0 | Dead zone: no towers from any source |
| Panatan | 164 | 0 | Dead zone: no towers from any source |
| Pitogo | 1,744 | 0 | Dead zone: no towers from any source |
| Purok 1 (Pob.) | 863 | 4 | Crowdsourced signal only (no registered tower) |
| Purok 2 (Pob.) | 419 | 2 | Crowdsourced signal only (no registered tower) |
| Purok 3 (Pob.) | 929 | 1 | Crowdsourced signal only (no registered tower) |
| Purok 4 (Pob.) | 1,020 | 0 | Dead zone: no towers from any source |
| Purok 5 (Pob.) | 990 | 0 | Dead zone: no towers from any source |
| Qui-anan | 662 | 0 | Dead zone: no towers from any source |
| Roma | 521 | 0 | Dead zone: no towers from any source |
| San Luis | 780 | 0 | Dead zone: no towers from any source |
| San Mateo Norte | 210 | 0 | Dead zone: no towers from any source |
| San Mateo Sur | 209 | 0 | Dead zone: no towers from any source |
| Santa Rita | 1,211 | 0 | Dead zone: no towers from any source |
| Santiago | 203 | 0 | Dead zone: no towers from any source |
| Sinogbuhan | 1,336 | 0 | Dead zone: no towers from any source |
| Siwaragan | 1,395 | 1 | Crowdsourced signal only (no registered tower) |
| Talagutac | 436 | 0 | Dead zone: no towers from any source |
| Tapikan | 330 | 0 | Dead zone: no towers from any source |
| Taslan | 768 | 0 | Dead zone: no towers from any source |
| Tiglawa | 743 | 0 | Dead zone: no towers from any source |
| Tiolas | 1,940 | 0 | Dead zone: no towers from any source |
| To-og | 591 | 1 | Crowdsourced signal only (no registered tower) |
| Torocadan | 318 | 0 | Dead zone: no towers from any source |
| Ulay | 391 | 0 | Dead zone: no towers from any source |