Garcia Hernandez comprises 30 barangays with an estimated population of 27,426. 21 of its barangays (70%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Abijilan | 1,933 | 0 | Dead zone: no towers from any source |
| Antipolo | 855 | 0 | Dead zone: no towers from any source |
| Basiao | 321 | 0 | Dead zone: no towers from any source |
| Cagwang | 782 | 0 | Dead zone: no towers from any source |
| Calma | 1,075 | 0 | Dead zone: no towers from any source |
| Cambuyo | 799 | 0 | Dead zone: no towers from any source |
| Canayaon East | 866 | 0 | Dead zone: no towers from any source |
| Canayaon West | 1,054 | 1 | Crowdsourced signal only (no registered tower) |
| Candanas | 594 | 0 | Dead zone: no towers from any source |
| Candulao | 401 | 0 | Dead zone: no towers from any source |
| Catmon | 548 | 0 | Dead zone: no towers from any source |
| Cayam | 1,285 | 3 | Crowdsourced signal only (no registered tower) |
| Cupa | 313 | 0 | Dead zone: no towers from any source |
| Datag | 1,584 | 0 | Dead zone: no towers from any source |
| Estaca | 328 | 0 | Dead zone: no towers from any source |
| Libertad | 249 | 0 | Dead zone: no towers from any source |
| Lungsodaan East | 1,124 | 3 | Crowdsourced signal only (no registered tower) |
| Lungsodaan West | 843 | 2 | Crowdsourced signal only (no registered tower) |
| Malinao | 1,587 | 6 | Crowdsourced signal only (no registered tower) |
| Manaba | 2,074 | 1 | Crowdsourced signal only (no registered tower) |
| Pasong | 732 | 0 | Dead zone: no towers from any source |
| Poblacion East | 1,133 | 0 | Dead zone: no towers from any source |
| Poblacion West | 1,123 | 1 | Crowdsourced signal only (no registered tower) |
| Sacaon | 781 | 0 | Dead zone: no towers from any source |
| Sampong | 820 | 0 | Dead zone: no towers from any source |
| Tabuan | 1,412 | 0 | Dead zone: no towers from any source |
| Togbongon | 449 | 0 | Dead zone: no towers from any source |
| Ulbujan East | 853 | 2 | Crowdsourced signal only (no registered tower) |
| Ulbujan West | 1,301 | 1 | Crowdsourced signal only (no registered tower) |
| Victoria | 207 | 0 | Dead zone: no towers from any source |