Iguig comprises 23 barangays with an estimated population of 24,205. 8 of its barangays (35%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Ajat (Pob.) | 1,788 | 4 | Crowdsourced signal only (no registered tower) |
| Atulu | 760 | 2 | Crowdsourced signal only (no registered tower) |
| Baculud | 753 | 1 | Crowdsourced signal only (no registered tower) |
| Bayo | 1,792 | 5 | Crowdsourced signal only (no registered tower) |
| Campo | 269 | 0 | Dead zone: no towers from any source |
| Dumpao | 659 | 6 | Crowdsourced signal only (no registered tower) |
| Gammad | 1,673 | 6 | Crowdsourced signal only (no registered tower) |
| Garab | 394 | 0 | Dead zone: no towers from any source |
| Malabbac | 1,616 | 3 | Crowdsourced signal only (no registered tower) |
| Manaoag (Aquiliquilao) | 958 | 0 | Dead zone: no towers from any source |
| Minanga Norte | 1,540 | 1 | Crowdsourced signal only (no registered tower) |
| Minanga Sur | 1,089 | 1 | Crowdsourced signal only (no registered tower) |
| Nattanzan (Pob.) | 1,420 | 2 | Crowdsourced signal only (no registered tower) |
| Redondo | 1,103 | 1 | Crowdsourced signal only (no registered tower) |
| Salamague | 586 | 2 | Crowdsourced signal only (no registered tower) |
| San Esteban (Capitan) | 1,104 | 1 | Crowdsourced signal only (no registered tower) |
| San Isidro (Ugac West) | 927 | 0 | Dead zone: no towers from any source |
| San Lorenzo | 1,347 | 3 | Crowdsourced signal only (no registered tower) |
| San Vicente (Ugac East) | 266 | 0 | Dead zone: no towers from any source |
| Santa Barbara | 1,512 | 0 | Dead zone: no towers from any source |
| Santa Rosa | 478 | 0 | Dead zone: no towers from any source |
| Santa Teresa (Gammad Sur) | 1,918 | 2 | Crowdsourced signal only (no registered tower) |
| Santiago | 253 | 0 | Dead zone: no towers from any source |