Lagonoy comprises 38 barangays with an estimated population of 72,075. 33 of its barangays (87%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Agosais | 360 | 0 | Dead zone: no towers from any source |
| Agpo-Camagong-Tabog | 3,948 | 0 | Dead zone: no towers from any source |
| Amoguis | 1,690 | 8 | Crowdsourced signal only (no registered tower) |
| Balaton | 863 | 0 | Dead zone: no towers from any source |
| Binanuahan | 3,800 | 1 | Crowdsourced signal only (no registered tower) |
| Bocogan | 2,061 | 0 | Dead zone: no towers from any source |
| Burabod | 6,188 | 12 | Crowdsourced signal only (no registered tower) |
| Cabotonan | 1,485 | 0 | Dead zone: no towers from any source |
| Dahat | 3,486 | 0 | Dead zone: no towers from any source |
| Del Carmen | 1,814 | 0 | Dead zone: no towers from any source |
| Gimagtocon | 2,209 | 0 | Dead zone: no towers from any source |
| Ginorangan (Genorangan) | 625 | 0 | Dead zone: no towers from any source |
| Gubat | 3,437 | 0 | Dead zone: no towers from any source |
| Guibahoy | 1,094 | 0 | Dead zone: no towers from any source |
| Himanag | 3,014 | 0 | Dead zone: no towers from any source |
| Kinahologan | 956 | 0 | Dead zone: no towers from any source |
| Loho | 2,319 | 0 | Dead zone: no towers from any source |
| Manamoc | 1,155 | 0 | Dead zone: no towers from any source |
| Mangogon | 647 | 0 | Dead zone: no towers from any source |
| Mapid | 1,247 | 0 | Dead zone: no towers from any source |
| Olas | 967 | 0 | Dead zone: no towers from any source |
| Omalo | 434 | 0 | Dead zone: no towers from any source |
| Panagan | 1,015 | 0 | Dead zone: no towers from any source |
| Panicuan | 449 | 0 | Dead zone: no towers from any source |
| Pinamihagan | 981 | 0 | Dead zone: no towers from any source |
| San Francisco (Pob.) | 1,059 | 2 | Crowdsourced signal only (no registered tower) |
| San Isidro | 788 | 0 | Dead zone: no towers from any source |
| San Isidro Norte (Pob.) | 1,362 | 0 | Dead zone: no towers from any source |
| San Isidro Sur (Pob.) | 855 | 0 | Dead zone: no towers from any source |
| San Rafael | 1,480 | 0 | Dead zone: no towers from any source |
| San Ramon | 3,980 | 1 | Crowdsourced signal only (no registered tower) |
| San Roque | 2,219 | 0 | Dead zone: no towers from any source |
| San Sebastian | 2,783 | 0 | Dead zone: no towers from any source |
| San Vicente (Pob.) | 1,011 | 0 | Dead zone: no towers from any source |
| Santa Cruz (Pob.) | 636 | 0 | Dead zone: no towers from any source |
| Santa Maria (Pob.) | 5,815 | 0 | Dead zone: no towers from any source |
| Saripongpong (Pob.) | 3,060 | 0 | Dead zone: no towers from any source |
| Sipaco | 783 | 0 | Dead zone: no towers from any source |