Tolosa comprises 15 barangays with an estimated population of 19,112. 7 of its barangays (47%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Burak | 161 | 0 | Dead zone: no towers from any source |
| Canmogsay | 382 | 0 | Dead zone: no towers from any source |
| Cantariwis | 231 | 0 | Dead zone: no towers from any source |
| Capangihan | 736 | 0 | Dead zone: no towers from any source |
| Doña Brigida | 1,522 | 2 | Crowdsourced signal only (no registered tower) |
| Imelda | 553 | 0 | Dead zone: no towers from any source |
| Malbog | 1,392 | 1 | Crowdsourced signal only (no registered tower) |
| Olot | 934 | 0 | Dead zone: no towers from any source |
| Opong | 3,263 | 4 | Crowdsourced signal only (no registered tower) |
| Poblacion | 553 | 1 | Crowdsourced signal only (no registered tower) |
| Quilao | 1,343 | 7 | Crowdsourced signal only (no registered tower) |
| San Roque | 3,571 | 4 | Crowdsourced signal only (no registered tower) |
| San Vicente | 744 | 0 | Dead zone: no towers from any source |
| Tanghas | 2,076 | 7 | Crowdsourced signal only (no registered tower) |
| Telegrafo | 1,651 | 2 | Crowdsourced signal only (no registered tower) |