San Manuel comprises 14 barangays with an estimated population of 55,929. 6 of its barangays (43%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Cabacaraan | 1,968 | 0 | Dead zone: no towers from any source |
| Cabaritan | 3,079 | 2 | Crowdsourced signal only (no registered tower) |
| Flores | 3,366 | 0 | Dead zone: no towers from any source |
| Guiset Norte (Pob.) | 7,178 | 8 | Crowdsourced signal only (no registered tower) |
| Guiset Sur (Pob.) | 7,942 | 5 | Crowdsourced signal only (no registered tower) |
| Lapalo | 1,510 | 1 | Crowdsourced signal only (no registered tower) |
| Nagsaag | 2,038 | 0 | Dead zone: no towers from any source |
| Narra | 4,109 | 0 | Dead zone: no towers from any source |
| San Antonio-Arzadon | 3,191 | 0 | Dead zone: no towers from any source |
| San Bonifacio | 4,265 | 5 | Crowdsourced signal only (no registered tower) |
| San Juan | 1,584 | 0 | Dead zone: no towers from any source |
| San Roque | 6,815 | 15 | Crowdsourced signal only (no registered tower) |
| San Vicente | 4,228 | 1 | Crowdsourced signal only (no registered tower) |
| Sto. Domingo | 4,656 | 2 | Crowdsourced signal only (no registered tower) |