Batangas has 1078 barangays across 34 municipalities. 386 barangays (36%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Agoncillo | 21 | 6 (29%) |
| Alitagtag | 19 | 5 (26%) |
| Balayan | 48 | 27 (56%) |
| Balete | 13 | 3 (23%) |
| Batangas City (Capital) | 105 | 26 (25%) |
| Bauan | 40 | 19 (48%) |
| Calatagan | 25 | 11 (44%) |
| City of Calaca | 40 | 14 (35%) |
| City of Sto. Tomas | 30 | 0 (0%) |
| City of Tanauan | 48 | 11 (23%) |
| Cuenca | 21 | 5 (24%) |
| Ibaan | 26 | 6 (23%) |
| Laurel | 21 | 6 (29%) |
| Lemery | 46 | 17 (37%) |
| Lian | 19 | 6 (32%) |
| Lipa City | 72 | 6 (8%) |
| Lobo | 26 | 21 (81%) |
| Mabini | 34 | 9 (26%) |
| Malvar | 15 | 4 (27%) |
| Mataasnakahoy | 16 | 7 (44%) |
| Nasugbu | 42 | 12 (29%) |
| Padre Garcia | 18 | 7 (39%) |
| Rosario | 48 | 22 (46%) |
| San Jose | 33 | 12 (36%) |
| San Juan | 42 | 15 (36%) |
| San Luis | 26 | 23 (88%) |
| San Nicolas | 18 | 13 (72%) |
| San Pascual | 29 | 13 (45%) |
| Santa Teresita | 17 | 9 (53%) |
| Taal | 42 | 22 (52%) |
| Talisay | 21 | 2 (10%) |
| Taysan | 20 | 8 (40%) |
| Tingloy | 15 | 10 (67%) |
| Tuy | 22 | 9 (41%) |