Siruma comprises 22 barangays with an estimated population of 11,246. 20 of its barangays (91%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bagong Sirang | 307 | 0 | Dead zone: no towers from any source |
| Bahao | 433 | 0 | Dead zone: no towers from any source |
| Boboan | 520 | 0 | Dead zone: no towers from any source |
| Butawanan | 746 | 0 | Dead zone: no towers from any source |
| Cabugao | 671 | 0 | Dead zone: no towers from any source |
| Fundado | 1,056 | 0 | Dead zone: no towers from any source |
| Homestead | 432 | 0 | Dead zone: no towers from any source |
| La Purisima | 270 | 2 | Crowdsourced signal only (no registered tower) |
| Mabuhay | 196 | 0 | Dead zone: no towers from any source |
| Malaconini | 136 | 0 | Dead zone: no towers from any source |
| Matandang Siruma | 113 | 0 | Dead zone: no towers from any source |
| Nalayahan | 347 | 1 | Crowdsourced signal only (no registered tower) |
| Pamintan-Bantilan | 427 | 0 | Dead zone: no towers from any source |
| Pinitan | 717 | 0 | Dead zone: no towers from any source |
| Poblacion | 1,338 | 0 | Dead zone: no towers from any source |
| Salvacion | 617 | 0 | Dead zone: no towers from any source |
| San Andres | 234 | 0 | Dead zone: no towers from any source |
| San Ramon (Daldagon) | 323 | 0 | Dead zone: no towers from any source |
| Sulpa | 568 | 0 | Dead zone: no towers from any source |
| Tandoc | 26 | 0 | Dead zone: no towers from any source |
| Tongo-Bantigue | 593 | 0 | Dead zone: no towers from any source |
| Vito | 1,176 | 0 | Dead zone: no towers from any source |