Calasiao comprises 24 barangays with an estimated population of 102,958. 12 of its barangays (50%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Ambonao | 7,498 | 4 | Crowdsourced signal only (no registered tower) |
| Ambuetel | 1,550 | 0 | Dead zone: no towers from any source |
| Banaoang | 6,039 | 6 | Crowdsourced signal only (no registered tower) |
| Bued | 7,347 | 10 | Crowdsourced signal only (no registered tower) |
| Buenlag | 12,579 | 1 | Crowdsourced signal only (no registered tower) |
| Cabilocaan | 3,246 | 0 | Dead zone: no towers from any source |
| Dinalaoan | 4,343 | 0 | Dead zone: no towers from any source |
| Doyong | 5,650 | 0 | Dead zone: no towers from any source |
| Gabon | 3,277 | 1 | Crowdsourced signal only (no registered tower) |
| Lasip | 1,280 | 0 | Dead zone: no towers from any source |
| Longos | 2,427 | 0 | Dead zone: no towers from any source |
| Lumbang | 1,241 | 0 | Dead zone: no towers from any source |
| Macabito | 4,215 | 1 | Crowdsourced signal only (no registered tower) |
| Malabago | 2,397 | 1 | Crowdsourced signal only (no registered tower) |
| Mancup | 4,430 | 0 | Dead zone: no towers from any source |
| Nagsaing | 5,502 | 0 | Dead zone: no towers from any source |
| Nalsian | 7,143 | 20 | Crowdsourced signal only (no registered tower) |
| Poblacion East | 780 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion West | 413 | 5 | Crowdsourced signal only (no registered tower) |
| Quesban | 3,456 | 1 | Crowdsourced signal only (no registered tower) |
| San Miguel | 9,987 | 20 | Crowdsourced signal only (no registered tower) |
| San Vicente | 1,789 | 0 | Dead zone: no towers from any source |
| Songkoy | 4,750 | 0 | Dead zone: no towers from any source |
| Talibaew | 1,619 | 0 | Dead zone: no towers from any source |