Metropolitan Manila Third District has 260 barangays across 4 municipalities. 6 barangays (2%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Caloocan City | 188 | 6 (3%) |
| City of Malabon | 21 | 0 (0%) |
| City of Navotas | 18 | 0 (0%) |
| City of Valenzuela | 33 | 0 (0%) |