Tiaong comprises 31 barangays with an estimated population of 108,123. 14 of its barangays (45%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Anastacia (Tagbak) | 4,106 | 1 | Crowdsourced signal only (no registered tower) |
| Aquino | 1,185 | 0 | Dead zone: no towers from any source |
| Ayusan I | 2,147 | 0 | Dead zone: no towers from any source |
| Ayusan II | 981 | 0 | Dead zone: no towers from any source |
| Barangay I (Pob.) | 1,466 | 6 | Crowdsourced signal only (no registered tower) |
| Barangay II (Pob.) | 490 | 1 | Crowdsourced signal only (no registered tower) |
| Barangay III (Pob.) | 1,268 | 9 | Crowdsourced signal only (no registered tower) |
| Barangay IV (Pob.) | 216 | 1 | Crowdsourced signal only (no registered tower) |
| Behia | 1,870 | 0 | Dead zone: no towers from any source |
| Bukal | 2,108 | 0 | Dead zone: no towers from any source |
| Bula | 2,677 | 0 | Dead zone: no towers from any source |
| Bulakin | 6,979 | 20 | Crowdsourced signal only (no registered tower) |
| Cabatang | 5,942 | 0 | Dead zone: no towers from any source |
| Cabay | 2,886 | 0 | Dead zone: no towers from any source |
| Del Rosario | 1,891 | 1 | Crowdsourced signal only (no registered tower) |
| Lagalag | 6,847 | 14 | Crowdsourced signal only (no registered tower) |
| Lalig | 11,496 | 41 | Crowdsourced signal only (no registered tower) |
| Lumingon | 7,346 | 22 | Crowdsourced signal only (no registered tower) |
| Lusacan | 9,797 | 16 | Crowdsourced signal only (no registered tower) |
| Paiisa | 8,981 | 3 | Crowdsourced signal only (no registered tower) |
| Palagaran | 5,708 | 2 | Crowdsourced signal only (no registered tower) |
| Quipot | 3,300 | 0 | Dead zone: no towers from any source |
| San Agustin | 1,849 | 1 | Crowdsourced signal only (no registered tower) |
| San Francisco | 1,550 | 1 | Crowdsourced signal only (no registered tower) |
| San Isidro | 1,740 | 0 | Dead zone: no towers from any source |
| San Jose | 3,603 | 0 | Dead zone: no towers from any source |
| San Juan | 1,753 | 0 | Dead zone: no towers from any source |
| San Pedro | 1,116 | 0 | Dead zone: no towers from any source |
| Tagbakin | 2,641 | 1 | Crowdsourced signal only (no registered tower) |
| Talisay | 3,071 | 17 | Crowdsourced signal only (no registered tower) |
| Tamisian | 1,113 | 0 | Dead zone: no towers from any source |