Polillo comprises 20 barangays with an estimated population of 21,771. 18 of its barangays (90%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Anawan | 407 | 0 | Dead zone: no towers from any source |
| Atulayan | 3,256 | 0 | Dead zone: no towers from any source |
| Balesin | 601 | 20 | Crowdsourced signal only (no registered tower) |
| Bañadero | 1,935 | 0 | Dead zone: no towers from any source |
| Binibitinan | 769 | 0 | Dead zone: no towers from any source |
| Bislian | 1,010 | 0 | Dead zone: no towers from any source |
| Bucao | 387 | 0 | Dead zone: no towers from any source |
| Canicanian | 664 | 0 | Dead zone: no towers from any source |
| Kalubakis | 667 | 0 | Dead zone: no towers from any source |
| Languyin | 1,390 | 0 | Dead zone: no towers from any source |
| Libjo | 613 | 0 | Dead zone: no towers from any source |
| Pamatdan | 1,121 | 0 | Dead zone: no towers from any source |
| Pilion | 547 | 0 | Dead zone: no towers from any source |
| Pinaglubayan | 303 | 0 | Dead zone: no towers from any source |
| Poblacion | 2,256 | 5 | Crowdsourced signal only (no registered tower) |
| Sabang | 1,232 | 0 | Dead zone: no towers from any source |
| Salipsip | 388 | 0 | Dead zone: no towers from any source |
| Sibulan | 2,332 | 0 | Dead zone: no towers from any source |
| Taluong | 999 | 0 | Dead zone: no towers from any source |
| Tamulaya-Anitong | 894 | 0 | Dead zone: no towers from any source |