Janiuay comprises 60 barangays with an estimated population of 78,748. 49 of its barangays (82%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Abangay | 872 | 1 | Crowdsourced signal only (no registered tower) |
| Agcarope | 613 | 0 | Dead zone: no towers from any source |
| Aglobong | 1,617 | 0 | Dead zone: no towers from any source |
| Aguingay | 708 | 0 | Dead zone: no towers from any source |
| Anhawan | 876 | 0 | Dead zone: no towers from any source |
| Aquino Nobleza East (Pob.) | 193 | 0 | Dead zone: no towers from any source |
| Aquino Nobleza West (Pob.) | 45 | 0 | Dead zone: no towers from any source |
| Atimonan | 1,627 | 0 | Dead zone: no towers from any source |
| Balanac | 848 | 0 | Dead zone: no towers from any source |
| Barasalon | 2,351 | 0 | Dead zone: no towers from any source |
| Bongol | 1,778 | 0 | Dead zone: no towers from any source |
| Cabantog | 262 | 0 | Dead zone: no towers from any source |
| Calmay | 2,054 | 0 | Dead zone: no towers from any source |
| Canawili | 2,540 | 0 | Dead zone: no towers from any source |
| Canawillian | 1,652 | 0 | Dead zone: no towers from any source |
| Capt. A. Tirador (Pob.) | 311 | 0 | Dead zone: no towers from any source |
| Caranas | 1,011 | 1 | Crowdsourced signal only (no registered tower) |
| Caraudan | 1,837 | 0 | Dead zone: no towers from any source |
| Carigangan | 1,187 | 0 | Dead zone: no towers from any source |
| Concepcion Pob. (D.G. Abordo) | 446 | 0 | Dead zone: no towers from any source |
| Crispin Salazar North (Pob.) | 534 | 0 | Dead zone: no towers from any source |
| Crispin Salazar South (Pob.) | 24 | 1 | Crowdsourced signal only (no registered tower) |
| Cunsad | 582 | 0 | Dead zone: no towers from any source |
| Dabong | 1,503 | 0 | Dead zone: no towers from any source |
| Damires | 1,123 | 6 | Crowdsourced signal only (no registered tower) |
| Damo-ong | 3,049 | 0 | Dead zone: no towers from any source |
| Danao | 2,224 | 3 | Crowdsourced signal only (no registered tower) |
| Don T. Lutero Center (Pob.) | 37 | 0 | Dead zone: no towers from any source |
| Don T. Lutero East (Pob.) | 383 | 0 | Dead zone: no towers from any source |
| Don T. Lutero West Pob. (Don T. Lutero North) | 1,543 | 0 | Dead zone: no towers from any source |
| Gines | 679 | 0 | Dead zone: no towers from any source |
| Golgota (Pob.) | 694 | 0 | Dead zone: no towers from any source |
| Guadalupe | 2,532 | 1 | Crowdsourced signal only (no registered tower) |
| Jibolo | 6,525 | 5 | Crowdsourced signal only (no registered tower) |
| Kuyot | 362 | 0 | Dead zone: no towers from any source |
| Locsin (Pob.) | 288 | 1 | Crowdsourced signal only (no registered tower) |
| Madong | 2,324 | 0 | Dead zone: no towers from any source |
| Manacabac | 853 | 0 | Dead zone: no towers from any source |
| Mangil | 1,691 | 0 | Dead zone: no towers from any source |
| Matag-ub | 1,836 | 0 | Dead zone: no towers from any source |
| Monte-Magapa | 2,146 | 0 | Dead zone: no towers from any source |
| Pangilihan | 1,801 | 0 | Dead zone: no towers from any source |
| Panuran | 1,640 | 0 | Dead zone: no towers from any source |
| Pararinga | 698 | 0 | Dead zone: no towers from any source |
| Patong-patong | 1,485 | 0 | Dead zone: no towers from any source |
| Quipot | 2,736 | 0 | Dead zone: no towers from any source |
| R. Armada (Pob.) | 787 | 0 | Dead zone: no towers from any source |
| S. M. Villa (Pob.) | 602 | 0 | Dead zone: no towers from any source |
| San Julian (Pob.) | 651 | 0 | Dead zone: no towers from any source |
| San Pedro (Pob.) | 349 | 0 | Dead zone: no towers from any source |
| Santa Rita (Pob.) | 3,513 | 1 | Crowdsourced signal only (no registered tower) |
| Santo Tomas | 1,362 | 0 | Dead zone: no towers from any source |
| Sarawag | 515 | 1 | Crowdsourced signal only (no registered tower) |
| Tambal | 1,344 | 0 | Dead zone: no towers from any source |
| Tamu-an | 1,098 | 1 | Crowdsourced signal only (no registered tower) |
| Tiringanan | 1,573 | 0 | Dead zone: no towers from any source |
| Tolarucan | 1,645 | 0 | Dead zone: no towers from any source |
| Tuburan | 1,154 | 0 | Dead zone: no towers from any source |
| Ubian | 1,273 | 0 | Dead zone: no towers from any source |
| Yabon | 762 | 0 | Dead zone: no towers from any source |