Cardona comprises 18 barangays with an estimated population of 39,255. 11 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 |
|---|---|---|---|
| Balibago | 2,163 | 0 | Dead zone: no towers from any source |
| Boor | 898 | 0 | Dead zone: no towers from any source |
| Calahan | 4,472 | 33 | Crowdsourced signal only (no registered tower) |
| Dalig | 4,602 | 2 | Crowdsourced signal only (no registered tower) |
| Del Remedio (Pob.) | 2,340 | 10 | Crowdsourced signal only (no registered tower) |
| Iglesia (Pob.) | 4,775 | 11 | Crowdsourced signal only (no registered tower) |
| Lambac | 2,223 | 0 | Dead zone: no towers from any source |
| Looc | 6,154 | 15 | Crowdsourced signal only (no registered tower) |
| Malanggam-Calubacan | 1,084 | 0 | Dead zone: no towers from any source |
| Nagsulo | 458 | 0 | Dead zone: no towers from any source |
| Navotas | 2,002 | 0 | Dead zone: no towers from any source |
| Patunhay | 0 | 4 | Crowdsourced signal only (no registered tower) |
| Real (Pob.) | 80 | 0 | Dead zone: no towers from any source |
| Sampad | 512 | 0 | Dead zone: no towers from any source |
| San Roque (Pob.) | 997 | 8 | Crowdsourced signal only (no registered tower) |
| Subay | 3,901 | 0 | Dead zone: no towers from any source |
| Ticulio | 1,895 | 0 | Dead zone: no towers from any source |
| Tuna | 699 | 0 | Dead zone: no towers from any source |