San Narciso comprises 24 barangays with an estimated population of 61,927. 22 of its barangays (92%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Abuyon | 7,200 | 1 | Crowdsourced signal only (no registered tower) |
| Andres Bonifacio | 900 | 0 | Dead zone: no towers from any source |
| Bani | 943 | 0 | Dead zone: no towers from any source |
| Bayanihan (Pob.) | 2,086 | 0 | Dead zone: no towers from any source |
| Binay | 2,996 | 0 | Dead zone: no towers from any source |
| Buenavista | 2,695 | 0 | Dead zone: no towers from any source |
| Busokbusokan | 3,742 | 0 | Dead zone: no towers from any source |
| Calwit | 2,020 | 0 | Dead zone: no towers from any source |
| Guinhalinan | 3,674 | 0 | Dead zone: no towers from any source |
| Lacdayan | 3,092 | 0 | Dead zone: no towers from any source |
| Maguiting | 1,638 | 0 | Dead zone: no towers from any source |
| Maligaya (Pob.) | 1,485 | 0 | Dead zone: no towers from any source |
| Manlampong | 1,180 | 0 | Dead zone: no towers from any source |
| Pagdadamayan (Pob.) | 1,881 | 0 | Dead zone: no towers from any source |
| Pagkakaisa (Pob.) | 2,074 | 1 | Crowdsourced signal only (no registered tower) |
| Punta | 2,078 | 0 | Dead zone: no towers from any source |
| Rizal | 912 | 0 | Dead zone: no towers from any source |
| San Isidro | 3,663 | 0 | Dead zone: no towers from any source |
| San Juan | 4,099 | 0 | Dead zone: no towers from any source |
| San Vicente | 2,294 | 0 | Dead zone: no towers from any source |
| Vigo Central | 2,451 | 0 | Dead zone: no towers from any source |
| Villa Aurin (Pinagsama) | 1,623 | 0 | Dead zone: no towers from any source |
| Villa Reyes | 4,649 | 0 | Dead zone: no towers from any source |
| White Cliff | 2,552 | 0 | Dead zone: no towers from any source |