Cauayan comprises 25 barangays with an estimated population of 101,408. 13 of its barangays (52%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Abaca | 984 | 0 | Dead zone: no towers from any source |
| Baclao | 1,650 | 0 | Dead zone: no towers from any source |
| Basak | 3,189 | 0 | Dead zone: no towers from any source |
| Bulata | 3,770 | 4 | Crowdsourced signal only (no registered tower) |
| Caliling | 5,320 | 14 | Crowdsourced signal only (no registered tower) |
| Camalanda-an | 8,236 | 0 | Dead zone: no towers from any source |
| Camindangan | 1,411 | 0 | Dead zone: no towers from any source |
| Elihan | 1,171 | 0 | Dead zone: no towers from any source |
| Guiljungan | 10,189 | 11 | Crowdsourced signal only (no registered tower) |
| Inayawan | 10,641 | 4 | Crowdsourced signal only (no registered tower) |
| Isio | 5,726 | 2 | Crowdsourced signal only (no registered tower) |
| Linaon | 2,898 | 2 | Crowdsourced signal only (no registered tower) |
| Lumbia | 1,714 | 0 | Dead zone: no towers from any source |
| Mambugsay | 5,799 | 3 | Crowdsourced signal only (no registered tower) |
| Man-Uling | 4,305 | 3 | Crowdsourced signal only (no registered tower) |
| Masaling | 3,292 | 2 | Crowdsourced signal only (no registered tower) |
| Molobolo | 1,697 | 0 | Dead zone: no towers from any source |
| Poblacion | 10,254 | 17 | Crowdsourced signal only (no registered tower) |
| Sura | 498 | 0 | Dead zone: no towers from any source |
| Talacdan | 4,652 | 0 | Dead zone: no towers from any source |
| Tambad | 1,371 | 0 | Dead zone: no towers from any source |
| Tiling | 2,362 | 1 | Crowdsourced signal only (no registered tower) |
| Tomina | 557 | 0 | Dead zone: no towers from any source |
| Tuyom | 8,285 | 3 | Crowdsourced signal only (no registered tower) |
| Yao-yao | 1,437 | 0 | Dead zone: no towers from any source |