Lagangilang comprises 17 barangays with an estimated population of 14,382. 14 of its barangays (82%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Aguet | 552 | 0 | Dead zone: no towers from any source |
| Bacooc | 440 | 0 | Dead zone: no towers from any source |
| Balais | 710 | 0 | Dead zone: no towers from any source |
| Cayapa | 944 | 0 | Dead zone: no towers from any source |
| Dalaguisen | 526 | 0 | Dead zone: no towers from any source |
| Laang | 727 | 0 | Dead zone: no towers from any source |
| Lagben | 477 | 0 | Dead zone: no towers from any source |
| Laguiben | 1,089 | 0 | Dead zone: no towers from any source |
| Nagtipulan | 1,526 | 0 | Dead zone: no towers from any source |
| Nagtupacan | 653 | 0 | Dead zone: no towers from any source |
| Paganao | 469 | 2 | Crowdsourced signal only (no registered tower) |
| Pawa | 504 | 0 | Dead zone: no towers from any source |
| Poblacion | 1,655 | 0 | Dead zone: no towers from any source |
| Presentar | 560 | 0 | Dead zone: no towers from any source |
| San Isidro | 878 | 5 | Crowdsourced signal only (no registered tower) |
| Tagodtod | 2,304 | 2 | Crowdsourced signal only (no registered tower) |
| Taping | 368 | 0 | Dead zone: no towers from any source |