Sibonga comprises 25 barangays with an estimated population of 47,896. 17 of its barangays (68%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Abugon | 1,137 | 6 | Verified coverage (NTC + crowdsourced) |
| Bae | 778 | 0 | Dead zone: no towers from any source |
| Bagacay | 1,568 | 4 | Verified coverage (NTC + crowdsourced) |
| Bahay | 5,743 | 12 | Verified coverage (NTC + crowdsourced) |
| Banlot | 1,849 | 0 | Dead zone: no towers from any source |
| Basak | 1,153 | 0 | Dead zone: no towers from any source |
| Bato | 1,056 | 0 | Dead zone: no towers from any source |
| Cagay | 474 | 0 | Dead zone: no towers from any source |
| Can-aga | 526 | 0 | Dead zone: no towers from any source |
| Candaguit | 2,715 | 8 | Verified coverage (NTC + crowdsourced) |
| Cantolaroy | 778 | 0 | Dead zone: no towers from any source |
| Dugoan | 433 | 0 | Dead zone: no towers from any source |
| Guimbangco-an | 932 | 0 | Dead zone: no towers from any source |
| Lamacan | 1,703 | 0 | Dead zone: no towers from any source |
| Libo | 1,799 | 0 | Dead zone: no towers from any source |
| Lindogon | 1,527 | 5 | Verified coverage (NTC + crowdsourced) |
| Magcagong | 938 | 0 | Dead zone: no towers from any source |
| Manatad | 2,282 | 0 | Dead zone: no towers from any source |
| Mangyan | 1,468 | 0 | Dead zone: no towers from any source |
| Papan | 670 | 0 | Dead zone: no towers from any source |
| Poblacion | 7,087 | 15 | Verified coverage (NTC + crowdsourced) |
| Sabang | 2,414 | 12 | Verified coverage (NTC + crowdsourced) |
| Sayao | 1,825 | 0 | Dead zone: no towers from any source |
| Simala | 4,209 | 9 | Verified coverage (NTC + crowdsourced) |
| Tubod | 2,832 | 0 | Dead zone: no towers from any source |