Cortes comprises 14 barangays with an estimated population of 17,722. 7 of its barangays (50%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| De la Paz | 2,971 | 11 | Crowdsourced signal only (no registered tower) |
| Fatima | 1,256 | 0 | Dead zone: no towers from any source |
| Loreto | 1,129 | 7 | Crowdsourced signal only (no registered tower) |
| Lourdes | 2,099 | 0 | Dead zone: no towers from any source |
| Malayo Norte | 1,426 | 7 | Crowdsourced signal only (no registered tower) |
| Malayo Sur | 683 | 0 | Dead zone: no towers from any source |
| Monserrat | 501 | 0 | Dead zone: no towers from any source |
| New Lourdes | 1,095 | 0 | Dead zone: no towers from any source |
| Patrocinio | 531 | 0 | Dead zone: no towers from any source |
| Poblacion | 1,365 | 7 | Crowdsourced signal only (no registered tower) |
| Rosario | 1,133 | 2 | Crowdsourced signal only (no registered tower) |
| Salvador | 1,142 | 1 | Crowdsourced signal only (no registered tower) |
| San Roque | 1,383 | 0 | Dead zone: no towers from any source |
| Upper de la Paz | 1,008 | 2 | Crowdsourced signal only (no registered tower) |