Quirino comprises 21 barangays with an estimated population of 24,285. 19 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 |
|---|---|---|---|
| Binarzang | 517 | 0 | Dead zone: no towers from any source |
| Cabaruan | 663 | 0 | Dead zone: no towers from any source |
| Camaal | 667 | 0 | Dead zone: no towers from any source |
| Dolores | 1,527 | 0 | Dead zone: no towers from any source |
| Luna | 3,220 | 1 | Crowdsourced signal only (no registered tower) |
| Manaoag | 1,363 | 0 | Dead zone: no towers from any source |
| Rizal | 908 | 1 | Crowdsourced signal only (no registered tower) |
| San Isidro | 547 | 0 | Dead zone: no towers from any source |
| San Jose | 301 | 0 | Dead zone: no towers from any source |
| San Juan | 976 | 0 | Dead zone: no towers from any source |
| San Mateo | 1,788 | 0 | Dead zone: no towers from any source |
| San Vicente | 533 | 0 | Dead zone: no towers from any source |
| Santa Catalina | 801 | 0 | Dead zone: no towers from any source |
| Santa Lucia (Pob.) | 1,654 | 0 | Dead zone: no towers from any source |
| Santiago | 1,716 | 0 | Dead zone: no towers from any source |
| Santo Domingo | 2,161 | 0 | Dead zone: no towers from any source |
| Sinait | 740 | 0 | Dead zone: no towers from any source |
| Suerte | 1,655 | 0 | Dead zone: no towers from any source |
| Villa Bulusan | 240 | 0 | Dead zone: no towers from any source |
| Villa Miguel (Ugak) | 1,150 | 0 | Dead zone: no towers from any source |
| Vintar | 1,158 | 0 | Dead zone: no towers from any source |