Sablayan comprises 22 barangays with an estimated population of 87,874. 11 of its barangays (50%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Batong Buhay | 12,988 | 1 | Crowdsourced signal only (no registered tower) |
| Buenavista | 3,116 | 8 | Crowdsourced signal only (no registered tower) |
| Burgos | 5,364 | 0 | Dead zone: no towers from any source |
| Claudio Salgado | 3,507 | 1 | Crowdsourced signal only (no registered tower) |
| General Emilio Aguinaldo | 632 | 0 | Dead zone: no towers from any source |
| Ibud | 2,256 | 0 | Dead zone: no towers from any source |
| Ilvita | 2,680 | 0 | Dead zone: no towers from any source |
| Lagnas | 1,004 | 0 | Dead zone: no towers from any source |
| Ligaya | 3,975 | 1 | Crowdsourced signal only (no registered tower) |
| Malisbong | 7,200 | 0 | Dead zone: no towers from any source |
| Paetan | 1,944 | 0 | Dead zone: no towers from any source |
| Pag-Asa | 7,320 | 4 | Crowdsourced signal only (no registered tower) |
| Poblacion (Lumangbayan) | 2,679 | 13 | Crowdsourced signal only (no registered tower) |
| San Agustin | 7,730 | 0 | Dead zone: no towers from any source |
| San Francisco | 5,916 | 0 | Dead zone: no towers from any source |
| San Nicolas | 608 | 0 | Dead zone: no towers from any source |
| San Vicente | 4,480 | 1 | Crowdsourced signal only (no registered tower) |
| Santa Lucia | 1,981 | 5 | Crowdsourced signal only (no registered tower) |
| Santo Niño | 8,278 | 6 | Crowdsourced signal only (no registered tower) |
| Tagumpay | 566 | 0 | Dead zone: no towers from any source |
| Tuban | 2,347 | 2 | Crowdsourced signal only (no registered tower) |
| Victoria | 1,303 | 1 | Crowdsourced signal only (no registered tower) |