Laguna has 682 barangays across 30 municipalities. 235 barangays (34%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Alaminos | 15 | 3 (20%) |
| Bay | 15 | 2 (13%) |
| Cabuyao City | 18 | 0 (0%) |
| Calauan | 17 | 3 (18%) |
| Cavinti | 19 | 9 (47%) |
| City of Biñan | 24 | 1 (4%) |
| City of Calamba | 54 | 6 (11%) |
| City of San Pedro | 27 | 3 (11%) |
| City of Santa Rosa | 18 | 0 (0%) |
| Famy | 20 | 10 (50%) |
| Kalayaan | 3 | 0 (0%) |
| Liliw | 33 | 22 (67%) |
| Los Baños | 14 | 2 (14%) |
| Luisiana | 23 | 18 (78%) |
| Lumban | 16 | 7 (44%) |
| Mabitac | 15 | 3 (20%) |
| Magdalena | 24 | 13 (54%) |
| Majayjay | 40 | 25 (62%) |
| Nagcarlan | 52 | 37 (71%) |
| Paete | 10 | 5 (50%) |
| Pagsanjan | 16 | 4 (25%) |
| Pakil | 13 | 5 (38%) |
| Pangil | 8 | 2 (25%) |
| Pila | 17 | 7 (41%) |
| Rizal | 11 | 5 (45%) |
| San Pablo City | 80 | 17 (21%) |
| Santa Cruz (Capital) | 26 | 10 (38%) |
| Santa Maria | 25 | 11 (44%) |
| Siniloan | 20 | 5 (25%) |
| Victoria | 9 | 0 (0%) |