Sison comprises 28 barangays with an estimated population of 46,287. 13 of its barangays (46%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Agat | 1,736 | 22 | Crowdsourced signal only (no registered tower) |
| Alibeng | 1,537 | 0 | Dead zone: no towers from any source |
| Amagbagan | 2,945 | 0 | Dead zone: no towers from any source |
| Artacho | 564 | 5 | Crowdsourced signal only (no registered tower) |
| Asan Norte | 1,482 | 4 | Crowdsourced signal only (no registered tower) |
| Asan Sur | 3,800 | 8 | Crowdsourced signal only (no registered tower) |
| Bantay Insik | 1,171 | 1 | Crowdsourced signal only (no registered tower) |
| Bila | 1,356 | 2 | Crowdsourced signal only (no registered tower) |
| Binmeckeg | 1,208 | 0 | Dead zone: no towers from any source |
| Bulaoen East | 1,221 | 0 | Dead zone: no towers from any source |
| Bulaoen West | 433 | 1 | Crowdsourced signal only (no registered tower) |
| Cabaritan | 1,257 | 1 | Crowdsourced signal only (no registered tower) |
| Calunetan | 1,228 | 0 | Dead zone: no towers from any source |
| Camangaan | 1,637 | 0 | Dead zone: no towers from any source |
| Cauringan | 1,619 | 10 | Crowdsourced signal only (no registered tower) |
| Dungon | 765 | 2 | Crowdsourced signal only (no registered tower) |
| Esperanza | 2,628 | 1 | Crowdsourced signal only (no registered tower) |
| Inmalog | 2,254 | 0 | Dead zone: no towers from any source |
| Killo | 1,674 | 0 | Dead zone: no towers from any source |
| Labayug | 2,357 | 0 | Dead zone: no towers from any source |
| Paldit | 3,504 | 13 | Crowdsourced signal only (no registered tower) |
| Pindangan | 1,620 | 0 | Dead zone: no towers from any source |
| Pinmilapil | 1,147 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion Central | 1,428 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion Norte | 973 | 0 | Dead zone: no towers from any source |
| Poblacion Sur | 1,684 | 8 | Crowdsourced signal only (no registered tower) |
| Sagunto | 1,398 | 0 | Dead zone: no towers from any source |
| Tara-tara | 1,661 | 0 | Dead zone: no towers from any source |