Piagapo comprises 37 barangays with an estimated population of 31,389. 37 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 |
|---|---|---|---|
| Aposong | 497 | 0 | Dead zone: no towers from any source |
| Bagoaingud | 2,046 | 0 | Dead zone: no towers from any source |
| Bangco (Pob.) | 82 | 0 | Dead zone: no towers from any source |
| Bansayan | 81 | 0 | Dead zone: no towers from any source |
| Basak | 2,377 | 0 | Dead zone: no towers from any source |
| Bobo | 677 | 0 | Dead zone: no towers from any source |
| Bualan | 1,213 | 0 | Dead zone: no towers from any source |
| Bubong Ilian | 259 | 0 | Dead zone: no towers from any source |
| Bubong Tawa-an | 1,147 | 0 | Dead zone: no towers from any source |
| Bubonga Mamaanun | 286 | 0 | Dead zone: no towers from any source |
| Gacap | 306 | 0 | Dead zone: no towers from any source |
| Ilian | 390 | 0 | Dead zone: no towers from any source |
| Ilian Poblacion | 431 | 0 | Dead zone: no towers from any source |
| Kalanganan | 1,480 | 0 | Dead zone: no towers from any source |
| Katumbacan | 123 | 0 | Dead zone: no towers from any source |
| Lininding | 630 | 0 | Dead zone: no towers from any source |
| Lumbaca Mamaan | 76 | 0 | Dead zone: no towers from any source |
| Mamaanun | 160 | 0 | Dead zone: no towers from any source |
| Mentring | 1,735 | 0 | Dead zone: no towers from any source |
| Olango | 110 | 0 | Dead zone: no towers from any source |
| Palacat | 804 | 0 | Dead zone: no towers from any source |
| Palao | 2,313 | 0 | Dead zone: no towers from any source |
| Paling | 122 | 0 | Dead zone: no towers from any source |
| Pantaon | 94 | 0 | Dead zone: no towers from any source |
| Pantar | 2,908 | 0 | Dead zone: no towers from any source |
| Paridi | 1,491 | 0 | Dead zone: no towers from any source |
| Pindolonan | 1,537 | 0 | Dead zone: no towers from any source |
| Radapan | 30 | 0 | Dead zone: no towers from any source |
| Radapan Poblacion | 40 | 0 | Dead zone: no towers from any source |
| Rantian | 204 | 0 | Dead zone: no towers from any source |
| Sapingit | 927 | 0 | Dead zone: no towers from any source |
| Talao | 2,167 | 0 | Dead zone: no towers from any source |
| Tambo | 112 | 0 | Dead zone: no towers from any source |
| Tapocan | 135 | 0 | Dead zone: no towers from any source |
| Taporug | 2,790 | 0 | Dead zone: no towers from any source |
| Tawaan | 414 | 0 | Dead zone: no towers from any source |
| Udalo | 1,195 | 0 | Dead zone: no towers from any source |