Oslob comprises 21 barangays with an estimated population of 35,148. 8 of its barangays (38%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Alo | 2,245 | 0 | Dead zone: no towers from any source |
| Bangcogon | 1,174 | 5 | Crowdsourced signal only (no registered tower) |
| Bonbon | 1,763 | 2 | Crowdsourced signal only (no registered tower) |
| Calumpang | 898 | 4 | Crowdsourced signal only (no registered tower) |
| Can-ukban | 752 | 0 | Dead zone: no towers from any source |
| Canangca-an | 1,902 | 0 | Dead zone: no towers from any source |
| Cansalo-ay | 1,264 | 0 | Dead zone: no towers from any source |
| Cañang | 2,762 | 0 | Dead zone: no towers from any source |
| Daanlungsod | 975 | 3 | Crowdsourced signal only (no registered tower) |
| Gawi | 1,307 | 8 | Crowdsourced signal only (no registered tower) |
| Hagdan | 1,313 | 1 | Crowdsourced signal only (no registered tower) |
| Lagunde | 4,217 | 11 | Crowdsourced signal only (no registered tower) |
| Looc | 2,148 | 5 | Crowdsourced signal only (no registered tower) |
| Luka | 1,512 | 3 | Crowdsourced signal only (no registered tower) |
| Mainit | 948 | 5 | Crowdsourced signal only (no registered tower) |
| Manlum | 482 | 0 | Dead zone: no towers from any source |
| Nueva Caceres | 881 | 0 | Dead zone: no towers from any source |
| Poblacion | 4,504 | 4 | Crowdsourced signal only (no registered tower) |
| Pungtod | 1,852 | 4 | Crowdsourced signal only (no registered tower) |
| Tan-awan | 772 | 8 | Crowdsourced signal only (no registered tower) |
| Tumalog | 1,477 | 0 | Dead zone: no towers from any source |