Tagana-an comprises 14 barangays with an estimated population of 13,676. 11 of its barangays (79%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Aurora (Pob.) | 592 | 0 | Dead zone: no towers from any source |
| Azucena (Pob.) | 436 | 0 | Dead zone: no towers from any source |
| Banban | 1,649 | 0 | Dead zone: no towers from any source |
| Cawilan | 512 | 0 | Dead zone: no towers from any source |
| Fabio | 200 | 0 | Dead zone: no towers from any source |
| Himamaug | 917 | 3 | Crowdsourced signal only (no registered tower) |
| Laurel | 564 | 0 | Dead zone: no towers from any source |
| Lower Libas | 762 | 1 | Crowdsourced signal only (no registered tower) |
| Opong | 1,028 | 0 | Dead zone: no towers from any source |
| Patino | 603 | 0 | Dead zone: no towers from any source |
| Sampaguita (Pob.) | 3,532 | 0 | Dead zone: no towers from any source |
| Talavera | 1,830 | 0 | Dead zone: no towers from any source |
| Union | 549 | 0 | Dead zone: no towers from any source |
| Upper Libas | 502 | 1 | Crowdsourced signal only (no registered tower) |