Maguindanao del Sur has 287 barangays across 24 municipalities. 247 barangays (86%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Ampatuan | 11 | 8 (73%) |
| Buluan | 7 | 4 (57%) |
| Datu Abdullah Sangki | 10 | 9 (90%) |
| Datu Anggal Midtimbang | 7 | 5 (71%) |
| Datu Hoffer Ampatuan | 11 | 9 (82%) |
| Datu Paglas | 23 | 19 (83%) |
| Datu Piang | 16 | 8 (50%) |
| Datu Salibo | 17 | 17 (100%) |
| Datu Saudi-Ampatuan | 8 | 7 (88%) |
| Datu Unsay | 8 | 6 (75%) |
| Gen. S.K. Pendatun | 19 | 18 (95%) |
| Guindulungan | 11 | 9 (82%) |
| Mamasapano | 14 | 12 (86%) |
| Mangudadatu | 8 | 8 (100%) |
| Pagagawan | 11 | 9 (82%) |
| Pagalungan | 12 | 12 (100%) |
| Paglat | 8 | 7 (88%) |
| Pandag | 8 | 7 (88%) |
| Rajah Buayan | 11 | 10 (91%) |
| Shariff Aguak (Maganoy) (Capital) | 13 | 12 (92%) |
| Shariff Saydona Mustapha | 16 | 16 (100%) |
| South Upi | 11 | 11 (100%) |
| Sultan Sa Barongis (Lambayong) | 12 | 10 (83%) |
| Talayan | 15 | 14 (93%) |