Lanao del Sur has 1161 barangays across 40 municipalities. 1064 barangays (92%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Amai Manabilang (Bumbaran) | 17 | 17 (100%) |
| Bacolod-Kalawi (Bacolod Grande) | 26 | 26 (100%) |
| Balabagan | 27 | 26 (96%) |
| Balindong (Watu) | 38 | 31 (82%) |
| Bayang | 49 | 49 (100%) |
| Binidayan | 26 | 26 (100%) |
| Buadiposo-Buntong | 33 | 33 (100%) |
| Bubong | 36 | 35 (97%) |
| Butig | 16 | 16 (100%) |
| Calanogas | 17 | 17 (100%) |
| Ditsaan-Ramain | 35 | 34 (97%) |
| Ganassi | 32 | 32 (100%) |
| Kapai | 20 | 20 (100%) |
| Kapatagan | 15 | 14 (93%) |
| Lumba-Bayabao (Maguing) | 38 | 38 (100%) |
| Lumbaca-Unayan | 9 | 9 (100%) |
| Lumbatan | 21 | 20 (95%) |
| Lumbayanague | 22 | 21 (95%) |
| Madalum | 37 | 37 (100%) |
| Madamba | 24 | 24 (100%) |
| Maguing | 34 | 34 (100%) |
| Malabang | 37 | 35 (95%) |
| Marantao | 34 | 31 (91%) |
| Marawi City (Capital) | 98 | 53 (54%) |
| Marogong | 24 | 24 (100%) |
| Masiu | 35 | 35 (100%) |
| Mulondo | 26 | 19 (73%) |
| Pagayawan (Tatarikan) | 18 | 18 (100%) |
| Piagapo | 37 | 37 (100%) |
| Picong (Sultan Gumander) | 19 | 17 (89%) |
| Poona Bayabao (Gata) | 25 | 24 (96%) |
| Pualas | 23 | 23 (100%) |
| Saguiaran | 30 | 22 (73%) |
| Sultan Dumalondong | 7 | 7 (100%) |
| Tagoloan II | 19 | 19 (100%) |
| Tamparan | 44 | 41 (93%) |
| Taraka | 43 | 39 (91%) |
| Tubaran | 21 | 21 (100%) |
| Tugaya | 23 | 21 (91%) |
| Wao | 26 | 19 (73%) |