Kiangan comprises 14 barangays with an estimated population of 18,312. 10 of its barangays (71%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Ambabag | 1,146 | 0 | Dead zone: no towers from any source |
| Baguinge | 1,356 | 2 | Crowdsourced signal only (no registered tower) |
| Bokiawan | 973 | 0 | Dead zone: no towers from any source |
| Bolog | 2,193 | 4 | Crowdsourced signal only (no registered tower) |
| Dalligan | 388 | 0 | Dead zone: no towers from any source |
| Duit | 2,999 | 0 | Dead zone: no towers from any source |
| Hucab | 2,015 | 5 | Crowdsourced signal only (no registered tower) |
| Julongan | 497 | 0 | Dead zone: no towers from any source |
| Lingay | 212 | 0 | Dead zone: no towers from any source |
| Mungayang | 1,143 | 0 | Dead zone: no towers from any source |
| Nagacadan | 1,990 | 0 | Dead zone: no towers from any source |
| Pindongan | 508 | 0 | Dead zone: no towers from any source |
| Poblacion | 889 | 0 | Dead zone: no towers from any source |
| Tuplac | 2,003 | 2 | Crowdsourced signal only (no registered tower) |