Agdangan comprises 12 barangays with an estimated population of 12,636. 6 of its barangays (50%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Binagbag | 1,164 | 3 | Crowdsourced signal only (no registered tower) |
| Dayap | 165 | 0 | Dead zone: no towers from any source |
| Ibabang Kinagunan | 1,700 | 2 | Crowdsourced signal only (no registered tower) |
| Ilayang Kinagunan | 185 | 0 | Dead zone: no towers from any source |
| Kanlurang Calutan | 750 | 0 | Dead zone: no towers from any source |
| Kanlurang Maligaya | 136 | 0 | Dead zone: no towers from any source |
| Poblacion I | 2,385 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion II | 687 | 1 | Crowdsourced signal only (no registered tower) |
| Salvacion | 1,092 | 1 | Crowdsourced signal only (no registered tower) |
| Silangang Calutan | 1,529 | 0 | Dead zone: no towers from any source |
| Silangang Maligaya | 1,154 | 0 | Dead zone: no towers from any source |
| Sildora | 1,689 | 2 | Crowdsourced signal only (no registered tower) |