San Manuel comprises 15 barangays with an estimated population of 24,514. 5 of its barangays (33%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Colubot | 992 | 4 | Crowdsourced signal only (no registered tower) |
| Lanat | 1,754 | 4 | Crowdsourced signal only (no registered tower) |
| Legaspi | 2,463 | 7 | Crowdsourced signal only (no registered tower) |
| Mangandingay | 3,438 | 0 | Dead zone: no towers from any source |
| Matarannoc | 1,555 | 2 | Crowdsourced signal only (no registered tower) |
| Pacpaco | 335 | 0 | Dead zone: no towers from any source |
| Poblacion | 236 | 1 | Crowdsourced signal only (no registered tower) |
| Salcedo | 1,149 | 11 | Crowdsourced signal only (no registered tower) |
| San Agustin | 2,333 | 15 | Crowdsourced signal only (no registered tower) |
| San Felipe | 2,217 | 0 | Dead zone: no towers from any source |
| San Jacinto | 553 | 0 | Dead zone: no towers from any source |
| San Miguel | 2,228 | 10 | Crowdsourced signal only (no registered tower) |
| San Narciso | 3,369 | 0 | Dead zone: no towers from any source |
| San Vicente | 501 | 3 | Crowdsourced signal only (no registered tower) |
| Santa Maria | 1,391 | 2 | Crowdsourced signal only (no registered tower) |