Sagñay comprises 19 barangays with an estimated population of 37,957. 12 of its barangays (63%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Aniog | 961 | 0 | Dead zone: no towers from any source |
| Atulayan | 420 | 0 | Dead zone: no towers from any source |
| Bongalon | 864 | 0 | Dead zone: no towers from any source |
| Buracan | 4,909 | 1 | Crowdsourced signal only (no registered tower) |
| Catalotoan | 1,930 | 0 | Dead zone: no towers from any source |
| Del Carmen (Pob.) | 2,758 | 6 | Crowdsourced signal only (no registered tower) |
| Kilantaao | 2,296 | 0 | Dead zone: no towers from any source |
| Kilomaon | 1,879 | 0 | Dead zone: no towers from any source |
| Mabca | 1,970 | 1 | Crowdsourced signal only (no registered tower) |
| Minadongjol | 2,191 | 0 | Dead zone: no towers from any source |
| Nato | 3,703 | 2 | Crowdsourced signal only (no registered tower) |
| Patitinan | 1,882 | 8 | Crowdsourced signal only (no registered tower) |
| San Antonio (Pob.) | 510 | 1 | Crowdsourced signal only (no registered tower) |
| San Isidro (Pob.) | 2,102 | 0 | Dead zone: no towers from any source |
| San Roque (Pob.) | 1,298 | 0 | Dead zone: no towers from any source |
| Santo Niño | 1,284 | 0 | Dead zone: no towers from any source |
| Sibaguan | 1,288 | 0 | Dead zone: no towers from any source |
| Tinorongan | 1,941 | 0 | Dead zone: no towers from any source |
| Turague | 3,771 | 3 | Crowdsourced signal only (no registered tower) |