Gumaca comprises 59 barangays with an estimated population of 82,167. 36 of its barangays (61%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Adia Bitaog | 113 | 0 | Dead zone: no towers from any source |
| Anonangin | 559 | 0 | Dead zone: no towers from any source |
| Bagong Buhay (Pob.) | 278 | 3 | Crowdsourced signal only (no registered tower) |
| Bamban | 1,620 | 5 | Crowdsourced signal only (no registered tower) |
| Bantad | 451 | 0 | Dead zone: no towers from any source |
| Batong Dalig | 266 | 0 | Dead zone: no towers from any source |
| Biga | 1,361 | 0 | Dead zone: no towers from any source |
| Binambang | 1,190 | 6 | Crowdsourced signal only (no registered tower) |
| Buensuceso | 4,496 | 6 | Crowdsourced signal only (no registered tower) |
| Bungahan | 252 | 0 | Dead zone: no towers from any source |
| Butaguin | 1,686 | 0 | Dead zone: no towers from any source |
| Calumangin | 1,337 | 4 | Crowdsourced signal only (no registered tower) |
| Camohaguin | 5,163 | 11 | Crowdsourced signal only (no registered tower) |
| Casasahan Ibaba | 546 | 0 | Dead zone: no towers from any source |
| Casasahan Ilaya | 167 | 0 | Dead zone: no towers from any source |
| Cawayan | 186 | 0 | Dead zone: no towers from any source |
| Gayagayaan | 425 | 0 | Dead zone: no towers from any source |
| Gitnang Barrio | 1,051 | 3 | Crowdsourced signal only (no registered tower) |
| Hagakhakin | 2,431 | 5 | Crowdsourced signal only (no registered tower) |
| Hardinan | 161 | 0 | Dead zone: no towers from any source |
| Inaclagan | 3,293 | 3 | Crowdsourced signal only (no registered tower) |
| Inagbuhan Ilaya | 262 | 0 | Dead zone: no towers from any source |
| Labnig | 1,511 | 0 | Dead zone: no towers from any source |
| Laguna | 385 | 0 | Dead zone: no towers from any source |
| Lagyo | 4,003 | 9 | Crowdsourced signal only (no registered tower) |
| Mabini (Pob.) | 5,261 | 0 | Dead zone: no towers from any source |
| Mabunga | 386 | 0 | Dead zone: no towers from any source |
| Malabtog | 667 | 0 | Dead zone: no towers from any source |
| Manlayaan | 1,029 | 0 | Dead zone: no towers from any source |
| Marcelo H. del Pilar | 170 | 0 | Dead zone: no towers from any source |
| Mataas Na Bundok | 294 | 0 | Dead zone: no towers from any source |
| Maunlad (Pob.) | 796 | 3 | Crowdsourced signal only (no registered tower) |
| Pagsabangan | 912 | 0 | Dead zone: no towers from any source |
| Panikihan | 3,117 | 1 | Crowdsourced signal only (no registered tower) |
| Peñafrancia (Pob.) | 1,205 | 8 | Crowdsourced signal only (no registered tower) |
| Pipisik (Pob.) | 1,187 | 0 | Dead zone: no towers from any source |
| Progreso | 5,139 | 1 | Crowdsourced signal only (no registered tower) |
| Rizal (Pob.) | 246 | 1 | Crowdsourced signal only (no registered tower) |
| Rosario | 3,645 | 14 | Crowdsourced signal only (no registered tower) |
| San Agustin | 260 | 0 | Dead zone: no towers from any source |
| San Diego | 574 | 0 | Dead zone: no towers from any source |
| San Diego Poblacion | 796 | 3 | Crowdsourced signal only (no registered tower) |
| San Isidro Kanluran | 495 | 0 | Dead zone: no towers from any source |
| San Isidro Silangan | 456 | 1 | Crowdsourced signal only (no registered tower) |
| San Juan de Jesus | 218 | 0 | Dead zone: no towers from any source |
| San Vicente | 3,663 | 4 | Crowdsourced signal only (no registered tower) |
| Sastre | 1,028 | 0 | Dead zone: no towers from any source |
| Tabing Dagat (Pob.) | 332 | 6 | Crowdsourced signal only (no registered tower) |
| Tumayan | 685 | 0 | Dead zone: no towers from any source |
| Villa Arcaya | 1,910 | 2 | Crowdsourced signal only (no registered tower) |
| Villa Bota | 4,204 | 1 | Crowdsourced signal only (no registered tower) |
| Villa Fuerte | 707 | 0 | Dead zone: no towers from any source |
| Villa M. Principe | 743 | 5 | Crowdsourced signal only (no registered tower) |
| Villa Mendoza | 107 | 0 | Dead zone: no towers from any source |
| Villa Nava | 3,086 | 0 | Dead zone: no towers from any source |
| Villa Padua | 4,505 | 0 | Dead zone: no towers from any source |
| Villa Perez | 587 | 0 | Dead zone: no towers from any source |
| Villa Tañada | 228 | 0 | Dead zone: no towers from any source |
| Villa Victoria | 336 | 0 | Dead zone: no towers from any source |