Cortes comprises 12 barangays with an estimated population of 13,208. 10 of its barangays (83%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Balibadon | 452 | 0 | Dead zone: no towers from any source |
| Burgos | 3,211 | 0 | Dead zone: no towers from any source |
| Capandan | 107 | 0 | Dead zone: no towers from any source |
| Mabahin | 2,066 | 0 | Dead zone: no towers from any source |
| Madrelino | 259 | 0 | Dead zone: no towers from any source |
| Manlico | 506 | 0 | Dead zone: no towers from any source |
| Matho | 1,054 | 0 | Dead zone: no towers from any source |
| Poblacion | 3,229 | 2 | Crowdsourced signal only (no registered tower) |
| Tag-Anongan | 263 | 0 | Dead zone: no towers from any source |
| Tigao | 1,816 | 2 | Crowdsourced signal only (no registered tower) |
| Tuboran | 158 | 0 | Dead zone: no towers from any source |
| Uba | 87 | 0 | Dead zone: no towers from any source |