Dimasalang comprises 20 barangays with an estimated population of 28,309. 19 of its barangays (95%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Balantay | 1,041 | 0 | Dead zone: no towers from any source |
| Balocawe | 2,771 | 0 | Dead zone: no towers from any source |
| Banahao | 2,043 | 0 | Dead zone: no towers from any source |
| Buenaflor | 1,393 | 0 | Dead zone: no towers from any source |
| Buracan | 322 | 0 | Dead zone: no towers from any source |
| Cabanoyoan | 673 | 0 | Dead zone: no towers from any source |
| Cabrera | 106 | 0 | Dead zone: no towers from any source |
| Cadulan | 1,338 | 0 | Dead zone: no towers from any source |
| Calabad | 770 | 0 | Dead zone: no towers from any source |
| Canomay | 2,633 | 0 | Dead zone: no towers from any source |
| Divisoria | 2,919 | 0 | Dead zone: no towers from any source |
| Gaid | 1,991 | 4 | Crowdsourced signal only (no registered tower) |
| Gregorio Alino (Pia-ong) | 3,007 | 0 | Dead zone: no towers from any source |
| Magcaraguit | 918 | 0 | Dead zone: no towers from any source |
| Mambog | 231 | 0 | Dead zone: no towers from any source |
| Poblacion | 1,229 | 0 | Dead zone: no towers from any source |
| Rizal | 971 | 0 | Dead zone: no towers from any source |
| San Vicente | 1,181 | 0 | Dead zone: no towers from any source |
| Suba | 2,099 | 0 | Dead zone: no towers from any source |
| T.R. Yangco (Yanco) | 673 | 0 | Dead zone: no towers from any source |