Ilagan City (Capital) comprises 91 barangays with an estimated population of 149,192. 55 of its barangays (60%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Aggasian | 6,687 | 0 | Dead zone: no towers from any source |
| Alibagu | 8,905 | 26 | Crowdsourced signal only (no registered tower) |
| Allinguigan 1st | 2,211 | 0 | Dead zone: no towers from any source |
| Allinguigan 2nd | 2,681 | 2 | Crowdsourced signal only (no registered tower) |
| Allinguigan 3rd | 662 | 3 | Crowdsourced signal only (no registered tower) |
| Arusip | 1,626 | 0 | Dead zone: no towers from any source |
| Baculod (Pob.) | 1,018 | 2 | Crowdsourced signal only (no registered tower) |
| Bagong Silang | 524 | 0 | Dead zone: no towers from any source |
| Bagumbayan (Pob.) | 1,410 | 2 | Crowdsourced signal only (no registered tower) |
| Baligatan | 2,536 | 15 | Crowdsourced signal only (no registered tower) |
| Ballacong | 576 | 0 | Dead zone: no towers from any source |
| Bangag | 437 | 0 | Dead zone: no towers from any source |
| Batong-Labang | 1,683 | 0 | Dead zone: no towers from any source |
| Bigao | 1,525 | 0 | Dead zone: no towers from any source |
| Cabannungan 1st | 1,468 | 0 | Dead zone: no towers from any source |
| Cabannungan 2nd | 1,578 | 0 | Dead zone: no towers from any source |
| Cabeseria 10 (Lapigui) | 1,174 | 0 | Dead zone: no towers from any source |
| Cabeseria 14 and 16 (Casilagan) | 2,341 | 1 | Crowdsourced signal only (no registered tower) |
| Cabeseria 17 and 21 (San Rafael) | 1,091 | 0 | Dead zone: no towers from any source |
| Cabeseria 19 (Villa Suerte*) | 716 | 0 | Dead zone: no towers from any source |
| Cabeseria 2 (Dappat) | 868 | 0 | Dead zone: no towers from any source |
| Cabeseria 22 (Sablang) | 979 | 0 | Dead zone: no towers from any source |
| Cabeseria 23 (San Francisco*) | 2,176 | 0 | Dead zone: no towers from any source |
| Cabeseria 25 (Sta. Lucia*) | 1,869 | 0 | Dead zone: no towers from any source |
| Cabeseria 27 (Abuan) | 133 | 0 | Dead zone: no towers from any source |
| Cabeseria 3 (San Fernando) | 1,648 | 0 | Dead zone: no towers from any source |
| Cabeseria 4 (San Manuel) | 1,390 | 0 | Dead zone: no towers from any source |
| Cabeseria 5 (Baribad) | 1,051 | 0 | Dead zone: no towers from any source |
| Cabeseria 6 & 24 (Villa Marcos*) | 960 | 0 | Dead zone: no towers from any source |
| Cabeseria 7 (Nangalisan) | 921 | 0 | Dead zone: no towers from any source |
| Cabeseria 9 and 11 (Capogotan) | 1,138 | 0 | Dead zone: no towers from any source |
| Cadu | 1,505 | 0 | Dead zone: no towers from any source |
| Calamagui 1st | 1,812 | 5 | Crowdsourced signal only (no registered tower) |
| Calamagui 2nd | 1,657 | 21 | Crowdsourced signal only (no registered tower) |
| Camunatan | 826 | 3 | Crowdsourced signal only (no registered tower) |
| Capellan | 5,898 | 0 | Dead zone: no towers from any source |
| Capo | 344 | 3 | Crowdsourced signal only (no registered tower) |
| Carikkikan Norte | 941 | 0 | Dead zone: no towers from any source |
| Carikkikan Sur | 154 | 0 | Dead zone: no towers from any source |
| Centro - San Antonio | 6,935 | 0 | Dead zone: no towers from any source |
| Centro Poblacion | 134 | 0 | Dead zone: no towers from any source |
| Fugu | 2,901 | 0 | Dead zone: no towers from any source |
| Fuyo | 1,156 | 1 | Crowdsourced signal only (no registered tower) |
| Gayong-Gayong Norte | 1,060 | 0 | Dead zone: no towers from any source |
| Gayong-Gayong Sur | 1,111 | 0 | Dead zone: no towers from any source |
| Guinatan | 1,422 | 4 | Crowdsourced signal only (no registered tower) |
| Imelda Bliss Village | 6,451 | 3 | Crowdsourced signal only (no registered tower) |
| Lullutan | 1,743 | 2 | Crowdsourced signal only (no registered tower) |
| Malalam | 2,092 | 4 | Crowdsourced signal only (no registered tower) |
| Malasin (Angeles) | 1,561 | 0 | Dead zone: no towers from any source |
| Manaring | 2,469 | 8 | Crowdsourced signal only (no registered tower) |
| Mangcuram | 590 | 0 | Dead zone: no towers from any source |
| Marana I | 1,950 | 2 | Crowdsourced signal only (no registered tower) |
| Marana II | 1,029 | 3 | Crowdsourced signal only (no registered tower) |
| Marana III | 795 | 0 | Dead zone: no towers from any source |
| Minabang | 1,052 | 0 | Dead zone: no towers from any source |
| Morado | 608 | 1 | Crowdsourced signal only (no registered tower) |
| Naguilian Norte | 989 | 2 | Crowdsourced signal only (no registered tower) |
| Naguilian Sur | 1,085 | 2 | Crowdsourced signal only (no registered tower) |
| Namnama | 1,085 | 1 | Crowdsourced signal only (no registered tower) |
| Nanaguan | 52 | 0 | Dead zone: no towers from any source |
| Osmeña (Sinippil) | 2,529 | 6 | Crowdsourced signal only (no registered tower) |
| Paliueg | 536 | 0 | Dead zone: no towers from any source |
| Pasa | 1,831 | 0 | Dead zone: no towers from any source |
| Pilar | 606 | 0 | Dead zone: no towers from any source |
| Quimalabasa | 112 | 5 | Crowdsourced signal only (no registered tower) |
| Rang-ayan (Bintacan) | 504 | 1 | Crowdsourced signal only (no registered tower) |
| Rugao | 989 | 3 | Crowdsourced signal only (no registered tower) |
| Salindingan | 732 | 0 | Dead zone: no towers from any source |
| San Andres (Angarilla) | 836 | 0 | Dead zone: no towers from any source |
| San Felipe | 1,758 | 6 | Crowdsourced signal only (no registered tower) |
| San Ignacio (Canapi) | 4,115 | 2 | Crowdsourced signal only (no registered tower) |
| San Isidro | 1,057 | 3 | Crowdsourced signal only (no registered tower) |
| San Juan | 2,601 | 1 | Crowdsourced signal only (no registered tower) |
| San Lorenzo | 553 | 0 | Dead zone: no towers from any source |
| San Pablo | 319 | 0 | Dead zone: no towers from any source |
| San Rodrigo | 1,560 | 0 | Dead zone: no towers from any source |
| San Vicente (Pob.) | 721 | 3 | Crowdsourced signal only (no registered tower) |
| Santa Barbara (Pob.) | 178 | 0 | Dead zone: no towers from any source |
| Santa Catalina | 758 | 0 | Dead zone: no towers from any source |
| Santa Isabel Norte | 1,127 | 1 | Crowdsourced signal only (no registered tower) |
| Santa Isabel Sur | 4,088 | 2 | Crowdsourced signal only (no registered tower) |
| Santa Maria (Cabeseria 8) | 3,632 | 0 | Dead zone: no towers from any source |
| Santa Victoria | 2,241 | 0 | Dead zone: no towers from any source |
| Santo Tomas | 2,262 | 1 | Crowdsourced signal only (no registered tower) |
| Siffu | 2,579 | 1 | Crowdsourced signal only (no registered tower) |
| Sindon Bayabo | 1,421 | 0 | Dead zone: no towers from any source |
| Sindon Maride | 1,985 | 0 | Dead zone: no towers from any source |
| Sipay | 846 | 0 | Dead zone: no towers from any source |
| Tangcul | 262 | 0 | Dead zone: no towers from any source |
| Villa Imelda (Maplas) | 1,065 | 0 | Dead zone: no towers from any source |