Tongkil comprises 14 barangays with an estimated population of 3,906. 14 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 |
|---|---|---|---|
| Bakkaan | 167 | 0 | Dead zone: no towers from any source |
| Bangalaw | 299 | 0 | Dead zone: no towers from any source |
| Danao | 201 | 0 | Dead zone: no towers from any source |
| Dungon | 638 | 0 | Dead zone: no towers from any source |
| Kahikukuk | 160 | 0 | Dead zone: no towers from any source |
| Luuk (Pob.) | 281 | 0 | Dead zone: no towers from any source |
| North Paarol | 108 | 0 | Dead zone: no towers from any source |
| Sigumbal | 241 | 0 | Dead zone: no towers from any source |
| South Paarol | 339 | 0 | Dead zone: no towers from any source |
| Tabialan | 364 | 0 | Dead zone: no towers from any source |
| Tainga-Bakkao | 270 | 0 | Dead zone: no towers from any source |
| Tambun-bun | 507 | 0 | Dead zone: no towers from any source |
| Tattalan | 217 | 0 | Dead zone: no towers from any source |
| Tinutungan | 114 | 0 | Dead zone: no towers from any source |