San Manuel comprises 19 barangays with an estimated population of 50,048. 5 of its barangays (26%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Agliam | 743 | 1 | Crowdsourced signal only (no registered tower) |
| Babanuang | 5,189 | 7 | Crowdsourced signal only (no registered tower) |
| Cabaritan | 455 | 6 | Crowdsourced signal only (no registered tower) |
| Caraniogan | 1,752 | 1 | Crowdsourced signal only (no registered tower) |
| District 1 (Pob.) | 5,729 | 6 | Crowdsourced signal only (no registered tower) |
| District 2 (Pob.) | 6,494 | 1 | Crowdsourced signal only (no registered tower) |
| District 3 (Pob.) | 3,119 | 10 | Crowdsourced signal only (no registered tower) |
| District 4 (Pob.) | 1,921 | 2 | Crowdsourced signal only (no registered tower) |
| Eden | 853 | 0 | Dead zone: no towers from any source |
| Malalinta | 2,099 | 1 | Crowdsourced signal only (no registered tower) |
| Mararigue | 1,991 | 0 | Dead zone: no towers from any source |
| Nueva Era | 3,286 | 0 | Dead zone: no towers from any source |
| Pisang | 5,017 | 0 | Dead zone: no towers from any source |
| San Francisco | 871 | 1 | Crowdsourced signal only (no registered tower) |
| Sandiat Centro | 970 | 1 | Crowdsourced signal only (no registered tower) |
| Sandiat East | 3,628 | 1 | Crowdsourced signal only (no registered tower) |
| Sandiat West | 1,047 | 0 | Dead zone: no towers from any source |
| Santa Cruz | 2,487 | 18 | Crowdsourced signal only (no registered tower) |
| Villanueva | 2,397 | 1 | Crowdsourced signal only (no registered tower) |