Tangalan comprises 15 barangays with an estimated population of 22,521. 9 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 |
|---|---|---|---|
| Afga | 2,046 | 2 | Crowdsourced signal only (no registered tower) |
| Baybay | 1,761 | 0 | Dead zone: no towers from any source |
| Dapdap | 879 | 0 | Dead zone: no towers from any source |
| Dumatad | 594 | 0 | Dead zone: no towers from any source |
| Jawili | 2,262 | 0 | Dead zone: no towers from any source |
| Lanipga | 368 | 0 | Dead zone: no towers from any source |
| Napatag | 311 | 0 | Dead zone: no towers from any source |
| Panayakan | 3,127 | 0 | Dead zone: no towers from any source |
| Poblacion | 2,107 | 3 | Crowdsourced signal only (no registered tower) |
| Pudiot | 1,653 | 1 | Crowdsourced signal only (no registered tower) |
| Tagas | 1,601 | 5 | Crowdsourced signal only (no registered tower) |
| Tamalagon | 2,614 | 7 | Crowdsourced signal only (no registered tower) |
| Tamokoe | 478 | 0 | Dead zone: no towers from any source |
| Tondog | 1,966 | 7 | Crowdsourced signal only (no registered tower) |
| Vivo | 754 | 0 | Dead zone: no towers from any source |