Tantangan comprises 13 barangays with an estimated population of 41,792. 3 of its barangays (23%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bukay Pait | 4,822 | 2 | Crowdsourced signal only (no registered tower) |
| Cabuling | 1,365 | 1 | Crowdsourced signal only (no registered tower) |
| Dumadalig | 6,674 | 8 | Crowdsourced signal only (no registered tower) |
| Libas | 4,004 | 0 | Dead zone: no towers from any source |
| Magon | 279 | 0 | Dead zone: no towers from any source |
| Maibo | 4,073 | 4 | Crowdsourced signal only (no registered tower) |
| Mangilala | 1,596 | 2 | Crowdsourced signal only (no registered tower) |
| New Cuyapo | 1,051 | 5 | Crowdsourced signal only (no registered tower) |
| New Iloilo | 5,398 | 9 | Crowdsourced signal only (no registered tower) |
| New Lambunao | 625 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion | 4,230 | 22 | Crowdsourced signal only (no registered tower) |
| San Felipe | 3,621 | 7 | Crowdsourced signal only (no registered tower) |
| Tinongcop | 4,054 | 0 | Dead zone: no towers from any source |