Cabusao comprises 9 barangays with an estimated population of 18,211. 6 of its barangays (67%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Barcelonita | 1,512 | 0 | Dead zone: no towers from any source |
| Biong | 1,601 | 0 | Dead zone: no towers from any source |
| Camagong | 2,571 | 1 | Crowdsourced signal only (no registered tower) |
| Castillo | 4,449 | 0 | Dead zone: no towers from any source |
| New Poblacion | 1,656 | 1 | Crowdsourced signal only (no registered tower) |
| Pandan | 3,167 | 1 | Crowdsourced signal only (no registered tower) |
| San Pedro | 1,888 | 0 | Dead zone: no towers from any source |
| Santa Cruz | 893 | 0 | Dead zone: no towers from any source |
| Santa Lutgarda (Pob.) | 474 | 0 | Dead zone: no towers from any source |