Santa Ana comprises 14 barangays with an estimated population of 55,733. 2 of its barangays (14%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| San Agustin | 5,946 | 17 | Crowdsourced signal only (no registered tower) |
| San Bartolome | 1,173 | 10 | Crowdsourced signal only (no registered tower) |
| San Isidro | 3,442 | 4 | Crowdsourced signal only (no registered tower) |
| San Joaquin (Pob.) | 1,404 | 2 | Crowdsourced signal only (no registered tower) |
| San Jose | 1,025 | 3 | Crowdsourced signal only (no registered tower) |
| San Juan | 1,868 | 4 | Crowdsourced signal only (no registered tower) |
| San Nicolas | 3,636 | 0 | Dead zone: no towers from any source |
| San Pablo | 6,094 | 2 | Crowdsourced signal only (no registered tower) |
| San Pedro | 1,872 | 1 | Crowdsourced signal only (no registered tower) |
| San Roque | 7,363 | 0 | Dead zone: no towers from any source |
| Santa Lucia | 6,962 | 17 | Crowdsourced signal only (no registered tower) |
| Santa Maria | 7,823 | 2 | Crowdsourced signal only (no registered tower) |
| Santiago | 777 | 2 | Crowdsourced signal only (no registered tower) |
| Santo Rosario | 6,348 | 2 | Crowdsourced signal only (no registered tower) |