Mambusao comprises 26 barangays with an estimated population of 37,589. 15 of its barangays (58%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Atiplo | 2,103 | 8 | Crowdsourced signal only (no registered tower) |
| Balat-an | 886 | 0 | Dead zone: no towers from any source |
| Balit | 857 | 0 | Dead zone: no towers from any source |
| Batiano | 677 | 0 | Dead zone: no towers from any source |
| Bating | 1,096 | 0 | Dead zone: no towers from any source |
| Bato Bato | 2,837 | 0 | Dead zone: no towers from any source |
| Baye | 770 | 0 | Dead zone: no towers from any source |
| Bergante | 502 | 0 | Dead zone: no towers from any source |
| Bula | 2,699 | 6 | Crowdsourced signal only (no registered tower) |
| Bunga | 1,382 | 0 | Dead zone: no towers from any source |
| Bungsi | 473 | 0 | Dead zone: no towers from any source |
| Burias | 2,649 | 12 | Crowdsourced signal only (no registered tower) |
| Caidquid | 1,992 | 2 | Crowdsourced signal only (no registered tower) |
| Cala-agus | 695 | 0 | Dead zone: no towers from any source |
| Libo-o | 725 | 0 | Dead zone: no towers from any source |
| Manibad | 1,362 | 8 | Crowdsourced signal only (no registered tower) |
| Maralag | 1,107 | 0 | Dead zone: no towers from any source |
| Najus-an | 1,363 | 0 | Dead zone: no towers from any source |
| Pangpang Norte | 955 | 0 | Dead zone: no towers from any source |
| Pangpang Sur | 336 | 0 | Dead zone: no towers from any source |
| Pinay | 676 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion Proper | 3,333 | 5 | Crowdsourced signal only (no registered tower) |
| Poblacion Tabuc | 3,249 | 1 | Crowdsourced signal only (no registered tower) |
| Sinondojan | 1,020 | 1 | Crowdsourced signal only (no registered tower) |
| Tugas | 1,603 | 2 | Crowdsourced signal only (no registered tower) |
| Tumalalud | 2,242 | 5 | Crowdsourced signal only (no registered tower) |