Cabiao comprises 23 barangays with an estimated population of 77,865. 14 of its barangays (61%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bagong Buhay | 502 | 0 | Dead zone: no towers from any source |
| Bagong Sikat | 2,483 | 0 | Dead zone: no towers from any source |
| Bagong Silang | 4,082 | 0 | Dead zone: no towers from any source |
| Concepcion | 4,660 | 11 | Crowdsourced signal only (no registered tower) |
| Entablado | 3,829 | 0 | Dead zone: no towers from any source |
| Maligaya | 1,053 | 5 | Crowdsourced signal only (no registered tower) |
| Natividad North (Pob.) | 41 | 0 | Dead zone: no towers from any source |
| Natividad South (Pob.) | 298 | 0 | Dead zone: no towers from any source |
| Palasinan | 3,241 | 0 | Dead zone: no towers from any source |
| Polilio | 761 | 0 | Dead zone: no towers from any source |
| San Antonio | 2,106 | 0 | Dead zone: no towers from any source |
| San Carlos | 2,930 | 0 | Dead zone: no towers from any source |
| San Fernando Norte | 4,196 | 4 | Crowdsourced signal only (no registered tower) |
| San Fernando Sur | 13,017 | 5 | Crowdsourced signal only (no registered tower) |
| San Gregorio | 317 | 0 | Dead zone: no towers from any source |
| San Juan North (Pob.) | 78 | 5 | Crowdsourced signal only (no registered tower) |
| San Juan South (Pob.) | 110 | 1 | Crowdsourced signal only (no registered tower) |
| San Roque | 4,606 | 5 | Crowdsourced signal only (no registered tower) |
| San Vicente | 7,142 | 7 | Crowdsourced signal only (no registered tower) |
| Santa Ines | 3,301 | 0 | Dead zone: no towers from any source |
| Santa Isabel | 4,015 | 0 | Dead zone: no towers from any source |
| Santa Rita | 10,009 | 15 | Crowdsourced signal only (no registered tower) |
| Sinipit | 5,088 | 0 | Dead zone: no towers from any source |