Cagdianao comprises 14 barangays with an estimated population of 12,904. 14 of its barangays (100%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Boa | 1,085 | 0 | Dead zone: no towers from any source |
| Cabunga-an | 991 | 0 | Dead zone: no towers from any source |
| Del Pilar | 2,298 | 0 | Dead zone: no towers from any source |
| Laguna | 164 | 0 | Dead zone: no towers from any source |
| Legaspi | 618 | 0 | Dead zone: no towers from any source |
| Ma-atas | 256 | 0 | Dead zone: no towers from any source |
| Mabini (Borja) | 901 | 0 | Dead zone: no towers from any source |
| Nueva Estrella | 839 | 0 | Dead zone: no towers from any source |
| Poblacion | 1,971 | 0 | Dead zone: no towers from any source |
| R. Ecleo, Sr. | 409 | 0 | Dead zone: no towers from any source |
| San Jose | 309 | 0 | Dead zone: no towers from any source |
| Santa Rita | 99 | 0 | Dead zone: no towers from any source |
| Tigbao | 2,272 | 0 | Dead zone: no towers from any source |
| Valencia | 692 | 0 | Dead zone: no towers from any source |