Bagulin comprises 10 barangays with an estimated population of 16,515. 10 of its barangays (100%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Alibangsay | 1,074 | 0 | Dead zone: no towers from any source |
| Baay | 1,198 | 0 | Dead zone: no towers from any source |
| Cambaly | 1,124 | 0 | Dead zone: no towers from any source |
| Cardiz | 1,583 | 0 | Dead zone: no towers from any source |
| Dagup | 3,342 | 0 | Dead zone: no towers from any source |
| Libbo | 2,261 | 0 | Dead zone: no towers from any source |
| Suyo (Pob.) | 1,827 | 0 | Dead zone: no towers from any source |
| Tagudtud | 1,824 | 0 | Dead zone: no towers from any source |
| Tio-angan | 1,417 | 0 | Dead zone: no towers from any source |
| Wallayan | 865 | 0 | Dead zone: no towers from any source |