San Rafael comprises 9 barangays with an estimated population of 19,372. 5 of its barangays (56%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Aripdip | 1,358 | 0 | Dead zone: no towers from any source |
| Bagacay | 2,164 | 2 | Crowdsourced signal only (no registered tower) |
| Calaigang | 1,505 | 1 | Crowdsourced signal only (no registered tower) |
| Ilongbukid | 1,615 | 0 | Dead zone: no towers from any source |
| Poblacion | 4,738 | 5 | Crowdsourced signal only (no registered tower) |
| Poscolon | 1,274 | 0 | Dead zone: no towers from any source |
| San Andres | 2,311 | 2 | Crowdsourced signal only (no registered tower) |
| San Dionisio | 1,581 | 0 | Dead zone: no towers from any source |
| San Florentino | 2,826 | 0 | Dead zone: no towers from any source |