Occidental Mindoro has 164 barangays across 11 municipalities. 116 barangays (71%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Abra de Ilog | 10 | 3 (30%) |
| Calintaan | 7 | 7 (100%) |
| Looc | 9 | 9 (100%) |
| Lubang | 16 | 15 (94%) |
| Magsaysay | 12 | 10 (83%) |
| Mamburao (Capital) | 15 | 6 (40%) |
| Paluan | 12 | 11 (92%) |
| Rizal | 11 | 10 (91%) |
| Sablayan | 22 | 11 (50%) |
| San Jose | 39 | 30 (77%) |
| Santa Cruz | 11 | 4 (36%) |