Santa Ana comprises 16 barangays with an estimated population of 47,763. 9 of its barangays (56%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Batu-Parada | 1,996 | 0 | Dead zone: no towers from any source |
| Casagan | 477 | 0 | Dead zone: no towers from any source |
| Casambalangan (Port Irene) | 9,306 | 1 | Crowdsourced signal only (no registered tower) |
| Centro (Pob.) | 7,290 | 13 | Crowdsourced signal only (no registered tower) |
| Diora-Zinungan | 1,980 | 4 | Crowdsourced signal only (no registered tower) |
| Dungeg | 895 | 2 | Crowdsourced signal only (no registered tower) |
| Kapanikian | 1,005 | 0 | Dead zone: no towers from any source |
| Marede | 2,388 | 0 | Dead zone: no towers from any source |
| Palawig | 2,760 | 2 | Crowdsourced signal only (no registered tower) |
| Patunungan | 1,448 | 0 | Dead zone: no towers from any source |
| Rapuli (Punti) | 4,211 | 2 | Crowdsourced signal only (no registered tower) |
| San Vicente (Fort) | 6,335 | 4 | Crowdsourced signal only (no registered tower) |
| Santa Clara | 1,722 | 0 | Dead zone: no towers from any source |
| Santa Cruz | 1,859 | 0 | Dead zone: no towers from any source |
| Tangatan | 1,476 | 0 | Dead zone: no towers from any source |
| Visitacion (Pob.) | 2,615 | 0 | Dead zone: no towers from any source |