Tomas Oppus comprises 29 barangays with an estimated population of 10,305. 21 of its barangays (72%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Anahawan | 81 | 0 | Dead zone: no towers from any source |
| Banday (Pob.) | 188 | 0 | Dead zone: no towers from any source |
| Biasong | 359 | 0 | Dead zone: no towers from any source |
| Bogo (Pob.) | 285 | 1 | Crowdsourced signal only (no registered tower) |
| Cabascan | 277 | 0 | Dead zone: no towers from any source |
| Camansi | 124 | 0 | Dead zone: no towers from any source |
| Cambite (Pob.) | 339 | 6 | Crowdsourced signal only (no registered tower) |
| Canlupao | 574 | 0 | Dead zone: no towers from any source |
| Carnaga | 710 | 0 | Dead zone: no towers from any source |
| Cawayan | 202 | 0 | Dead zone: no towers from any source |
| Higosoan | 676 | 0 | Dead zone: no towers from any source |
| Hinagtikan | 192 | 0 | Dead zone: no towers from any source |
| Hinapo | 222 | 1 | Crowdsourced signal only (no registered tower) |
| Hugpa | 461 | 0 | Dead zone: no towers from any source |
| Iniguihan Pob. (Salvacion) | 258 | 0 | Dead zone: no towers from any source |
| Looc | 700 | 0 | Dead zone: no towers from any source |
| Luan | 122 | 0 | Dead zone: no towers from any source |
| Maanyag | 346 | 0 | Dead zone: no towers from any source |
| Mag-ata | 138 | 2 | Crowdsourced signal only (no registered tower) |
| Mapgap | 30 | 0 | Dead zone: no towers from any source |
| Maslog | 743 | 0 | Dead zone: no towers from any source |
| Punong | 255 | 0 | Dead zone: no towers from any source |
| Rizal | 83 | 0 | Dead zone: no towers from any source |
| San Agustin | 117 | 0 | Dead zone: no towers from any source |
| San Antonio | 498 | 1 | Crowdsourced signal only (no registered tower) |
| San Isidro | 570 | 3 | Crowdsourced signal only (no registered tower) |
| San Miguel | 399 | 0 | Dead zone: no towers from any source |
| San Roque | 765 | 2 | Crowdsourced signal only (no registered tower) |
| Tinago | 591 | 2 | Crowdsourced signal only (no registered tower) |