Cainta comprises 7 barangays with an estimated population of 409,258. 0 of its barangays (0%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| San Andres (Pob.) | 99,397 | 422 | Verified coverage (NTC + crowdsourced) |
| San Isidro | 96,711 | 509 | Verified coverage (NTC + crowdsourced) |
| San Juan | 136,712 | 489 | Verified coverage (NTC + crowdsourced) |
| San Roque | 9,695 | 24 | Crowdsourced signal only (no registered tower) |
| Santa Rosa | 474 | 20 | Crowdsourced signal only (no registered tower) |
| Santo Domingo | 60,150 | 656 | Verified coverage (NTC + crowdsourced) |
| Santo Niño | 6,119 | 121 | Crowdsourced signal only (no registered tower) |