Iba (Capital) comprises 14 barangays with an estimated population of 50,270. 4 of its barangays (29%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Amungan | 8,445 | 10 | Crowdsourced signal only (no registered tower) |
| Bangantalinga | 2,009 | 3 | Crowdsourced signal only (no registered tower) |
| Dirita-Baloguen | 6,796 | 10 | Crowdsourced signal only (no registered tower) |
| Lipay-Dingin-Panibuatan | 3,060 | 0 | Dead zone: no towers from any source |
| Palanginan (Palanguinan-Tambak) | 14,077 | 17 | Crowdsourced signal only (no registered tower) |
| San Agustin | 3,173 | 8 | Crowdsourced signal only (no registered tower) |
| Santa Barbara | 4,426 | 1 | Crowdsourced signal only (no registered tower) |
| Santo Rosario | 1,868 | 2 | Crowdsourced signal only (no registered tower) |
| Zone 1 Pob. (Libaba) | 4,634 | 12 | Crowdsourced signal only (no registered tower) |
| Zone 2 Pob. (Aypa) | 246 | 0 | Dead zone: no towers from any source |
| Zone 3 Pob. (Botlay) | 153 | 0 | Dead zone: no towers from any source |
| Zone 4 Pob. (Sagapan) | 125 | 0 | Dead zone: no towers from any source |
| Zone 5 Pob. (Bano) | 358 | 1 | Crowdsourced signal only (no registered tower) |
| Zone 6 Pob. (Baytan) | 900 | 2 | Crowdsourced signal only (no registered tower) |