Negros Occidental has 662 barangays across 32 municipalities. 287 barangays (43%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Bacolod City (Capital) | 61 | 0 (0%) |
| Bago City | 24 | 4 (17%) |
| Binalbagan | 16 | 7 (44%) |
| Cadiz City | 22 | 10 (45%) |
| Calatrava | 40 | 30 (75%) |
| Candoni | 9 | 9 (100%) |
| Cauayan | 25 | 13 (52%) |
| City of Escalante | 21 | 14 (67%) |
| City of Himamaylan | 19 | 9 (47%) |
| City of Kabankalan | 32 | 7 (22%) |
| City of Sipalay | 17 | 6 (35%) |
| City of Talisay | 27 | 6 (22%) |
| City of Victorias | 26 | 14 (54%) |
| Enrique B. Magalona (Saravia) | 23 | 9 (39%) |
| Hinigaran | 24 | 14 (58%) |
| Hinoba-an (Asia) | 13 | 2 (15%) |
| Ilog | 15 | 7 (47%) |
| Isabela | 30 | 19 (63%) |
| La Carlota City | 14 | 3 (21%) |
| La Castellana | 13 | 2 (15%) |
| Manapla | 12 | 3 (25%) |
| Moises Padilla (Magallon) | 15 | 13 (87%) |
| Murcia | 23 | 10 (43%) |
| Pontevedra | 20 | 10 (50%) |
| Pulupandan | 20 | 14 (70%) |
| Sagay City | 25 | 15 (60%) |
| Salvador Benedicto | 7 | 6 (86%) |
| San Carlos City | 18 | 9 (50%) |
| San Enrique | 10 | 1 (10%) |
| Silay City | 16 | 4 (25%) |
| Toboso | 9 | 8 (89%) |
| Valladolid | 16 | 9 (56%) |