Mainit comprises 21 barangays with an estimated population of 29,796. 14 of its barangays (67%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Binga | 743 | 0 | Dead zone: no towers from any source |
| Bobona-on | 589 | 0 | Dead zone: no towers from any source |
| Cantugas | 618 | 0 | Dead zone: no towers from any source |
| Dayano | 761 | 0 | Dead zone: no towers from any source |
| Mabini | 2,760 | 2 | Crowdsourced signal only (no registered tower) |
| Magpayang | 1,981 | 10 | Crowdsourced signal only (no registered tower) |
| Magsaysay (Pob.) | 681 | 0 | Dead zone: no towers from any source |
| Mansayao | 1,287 | 0 | Dead zone: no towers from any source |
| Marayag | 679 | 3 | Crowdsourced signal only (no registered tower) |
| Matin-ao | 3,858 | 1 | Crowdsourced signal only (no registered tower) |
| Paco | 174 | 0 | Dead zone: no towers from any source |
| Quezon (Pob.) | 1,550 | 8 | Crowdsourced signal only (no registered tower) |
| Roxas | 3,682 | 2 | Crowdsourced signal only (no registered tower) |
| San Francisco | 3,159 | 0 | Dead zone: no towers from any source |
| San Isidro | 4,286 | 7 | Crowdsourced signal only (no registered tower) |
| San Jose | 952 | 0 | Dead zone: no towers from any source |
| Siana | 744 | 0 | Dead zone: no towers from any source |
| Silop | 410 | 0 | Dead zone: no towers from any source |
| Tagbuyawan | 183 | 0 | Dead zone: no towers from any source |
| Tapi-an | 403 | 0 | Dead zone: no towers from any source |
| Tolingon | 296 | 0 | Dead zone: no towers from any source |