Lian comprises 19 barangays with an estimated population of 38,063. 6 of its barangays (32%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bagong Pook | 1,281 | 0 | Dead zone: no towers from any source |
| Balibago | 3,488 | 6 | Crowdsourced signal only (no registered tower) |
| Barangay 1 (Pob.) | 347 | 0 | Dead zone: no towers from any source |
| Barangay 2 (Pob.) | 270 | 0 | Dead zone: no towers from any source |
| Barangay 3 (Pob.) | 573 | 6 | Crowdsourced signal only (no registered tower) |
| Barangay 4 (Pob.) | 490 | 1 | Crowdsourced signal only (no registered tower) |
| Barangay 5 (Pob.) | 486 | 1 | Crowdsourced signal only (no registered tower) |
| Binubusan | 3,997 | 19 | Crowdsourced signal only (no registered tower) |
| Bungahan | 1,948 | 2 | Crowdsourced signal only (no registered tower) |
| Cumba | 1,584 | 0 | Dead zone: no towers from any source |
| Humayingan | 1,174 | 0 | Dead zone: no towers from any source |
| Kapito | 1,514 | 0 | Dead zone: no towers from any source |
| Lumaniag | 1,933 | 2 | Crowdsourced signal only (no registered tower) |
| Luyahan | 1,691 | 6 | Crowdsourced signal only (no registered tower) |
| Malaruhatan | 4,279 | 8 | Crowdsourced signal only (no registered tower) |
| Matabungkay | 4,154 | 21 | Crowdsourced signal only (no registered tower) |
| Prenza | 3,791 | 21 | Crowdsourced signal only (no registered tower) |
| Puting-Kahoy | 955 | 24 | Crowdsourced signal only (no registered tower) |
| San Diego | 4,108 | 6 | Crowdsourced signal only (no registered tower) |