Tarragona comprises 10 barangays with an estimated population of 27,814. 10 of its barangays (100%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Cabagayan | 3,709 | 0 | Dead zone: no towers from any source |
| Central (Pob.) | 2,896 | 0 | Dead zone: no towers from any source |
| Dadong | 732 | 0 | Dead zone: no towers from any source |
| Jovellar | 1,757 | 0 | Dead zone: no towers from any source |
| Limot | 3,934 | 0 | Dead zone: no towers from any source |
| Lucatan | 3,153 | 0 | Dead zone: no towers from any source |
| Maganda | 4,187 | 0 | Dead zone: no towers from any source |
| Ompao | 1,101 | 0 | Dead zone: no towers from any source |
| Tomoaong | 4,147 | 0 | Dead zone: no towers from any source |
| Tubaon | 2,198 | 0 | Dead zone: no towers from any source |