San Teodoro comprises 8 barangays with an estimated population of 9,260. 7 of its barangays (88%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bigaan | 812 | 0 | Dead zone: no towers from any source |
| Caagutayan | 1,768 | 0 | Dead zone: no towers from any source |
| Calangatan | 2,207 | 0 | Dead zone: no towers from any source |
| Calsapa | 1,033 | 0 | Dead zone: no towers from any source |
| Ilag | 773 | 1 | Crowdsourced signal only (no registered tower) |
| Lumangbayan | 1,210 | 0 | Dead zone: no towers from any source |
| Poblacion | 376 | 0 | Dead zone: no towers from any source |
| Tacligan | 1,081 | 0 | Dead zone: no towers from any source |