Maasin comprises 50 barangays with an estimated population of 47,142. 41 of its barangays (82%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| AGROCEL Pob. (Aguinaldo-Roxas--Celso Mayor) | 1,186 | 4 | Crowdsourced signal only (no registered tower) |
| Abay | 378 | 0 | Dead zone: no towers from any source |
| Abilay | 1,202 | 0 | Dead zone: no towers from any source |
| Amerang | 635 | 0 | Dead zone: no towers from any source |
| Bagacay East | 767 | 0 | Dead zone: no towers from any source |
| Bagacay West | 1,121 | 0 | Dead zone: no towers from any source |
| Bolo | 739 | 0 | Dead zone: no towers from any source |
| Bug-ot | 501 | 0 | Dead zone: no towers from any source |
| Bulay | 594 | 0 | Dead zone: no towers from any source |
| Buntalan | 1,197 | 0 | Dead zone: no towers from any source |
| Burak | 796 | 0 | Dead zone: no towers from any source |
| Cabangcalan | 1,779 | 0 | Dead zone: no towers from any source |
| Cabatac | 363 | 0 | Dead zone: no towers from any source |
| Caigon | 1,104 | 0 | Dead zone: no towers from any source |
| Cananghan | 494 | 0 | Dead zone: no towers from any source |
| Canawili | 753 | 0 | Dead zone: no towers from any source |
| DELCAR Pob. (Delgado-Cartagena) | 3,356 | 1 | Crowdsourced signal only (no registered tower) |
| Dagami | 1,879 | 0 | Dead zone: no towers from any source |
| Daja | 1,451 | 0 | Dead zone: no towers from any source |
| Dalusan | 565 | 0 | Dead zone: no towers from any source |
| Inabasan | 816 | 0 | Dead zone: no towers from any source |
| Layog | 1,998 | 0 | Dead zone: no towers from any source |
| Linab | 673 | 0 | Dead zone: no towers from any source |
| Liñagan Calsada | 43 | 0 | Dead zone: no towers from any source |
| Liñagan Tacas | 289 | 0 | Dead zone: no towers from any source |
| MARI Pob. (Mabini-Rizal) | 407 | 3 | Crowdsourced signal only (no registered tower) |
| Magsaysay | 854 | 3 | Crowdsourced signal only (no registered tower) |
| Mandog | 1,226 | 1 | Crowdsourced signal only (no registered tower) |
| Miapa | 367 | 0 | Dead zone: no towers from any source |
| Nagba | 1,854 | 0 | Dead zone: no towers from any source |
| Nasaka | 885 | 0 | Dead zone: no towers from any source |
| Naslo-Bucao | 1,170 | 3 | Crowdsourced signal only (no registered tower) |
| Nasuli | 730 | 0 | Dead zone: no towers from any source |
| Panalian | 1,183 | 0 | Dead zone: no towers from any source |
| Piandaan East | 238 | 0 | Dead zone: no towers from any source |
| Piandaan West | 497 | 0 | Dead zone: no towers from any source |
| Pispis | 751 | 0 | Dead zone: no towers from any source |
| Punong | 436 | 0 | Dead zone: no towers from any source |
| Santa Rita | 197 | 0 | Dead zone: no towers from any source |
| Sinubsuban | 922 | 1 | Crowdsourced signal only (no registered tower) |
| Siwalo | 626 | 0 | Dead zone: no towers from any source |
| Subog | 928 | 0 | Dead zone: no towers from any source |
| THTP Pob. (Taft-Thompson--Hughes-del Pilar) | 483 | 1 | Crowdsourced signal only (no registered tower) |
| Tigbauan | 752 | 0 | Dead zone: no towers from any source |
| Trangka | 3,042 | 0 | Dead zone: no towers from any source |
| Tubang | 2,261 | 3 | Crowdsourced signal only (no registered tower) |
| Tulahong | 430 | 0 | Dead zone: no towers from any source |
| Tuy-an East | 721 | 0 | Dead zone: no towers from any source |
| Tuy-an West | 852 | 0 | Dead zone: no towers from any source |
| Ubian | 651 | 0 | Dead zone: no towers from any source |