Sison comprises 12 barangays with an estimated population of 8,806. 7 of its barangays (58%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Biyabid | 1,224 | 0 | Dead zone: no towers from any source |
| Gacepan | 968 | 0 | Dead zone: no towers from any source |
| Ima | 1,233 | 0 | Dead zone: no towers from any source |
| Lower Patag | 536 | 3 | Crowdsourced signal only (no registered tower) |
| Mabuhay | 1,344 | 3 | Crowdsourced signal only (no registered tower) |
| Mayag | 276 | 0 | Dead zone: no towers from any source |
| Poblacion (San Pedro) | 785 | 1 | Crowdsourced signal only (no registered tower) |
| San Isidro | 28 | 0 | Dead zone: no towers from any source |
| San Pablo | 369 | 2 | Crowdsourced signal only (no registered tower) |
| Tagbayani | 689 | 0 | Dead zone: no towers from any source |
| Tinogpahan | 856 | 6 | Crowdsourced signal only (no registered tower) |
| Upper Patag | 498 | 0 | Dead zone: no towers from any source |