Northern Samar has 569 barangays across 24 municipalities. 523 barangays (92%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Allen | 20 | 15 (75%) |
| Biri | 8 | 6 (75%) |
| Bobon | 18 | 17 (94%) |
| Capul | 12 | 12 (100%) |
| Catarman (Capital) | 55 | 39 (71%) |
| Catubig | 47 | 44 (94%) |
| Gamay | 26 | 26 (100%) |
| Laoang | 56 | 55 (98%) |
| Lapinig | 15 | 15 (100%) |
| Las Navas | 53 | 50 (94%) |
| Lavezares | 26 | 25 (96%) |
| Lope De Vega | 22 | 22 (100%) |
| Mapanas | 13 | 13 (100%) |
| Mondragon | 24 | 23 (96%) |
| Palapag | 32 | 30 (94%) |
| Pambujan | 26 | 26 (100%) |
| Rosario | 11 | 10 (91%) |
| San Antonio | 10 | 9 (90%) |
| San Isidro | 14 | 11 (79%) |
| San Jose | 16 | 13 (81%) |
| San Roque | 16 | 13 (81%) |
| San Vicente | 7 | 7 (100%) |
| Silvino Lobos | 26 | 26 (100%) |
| Victoria | 16 | 16 (100%) |