Magalang comprises 27 barangays with an estimated population of 191,119. 11 of its barangays (41%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Ayala | 2,780 | 0 | Dead zone: no towers from any source |
| Bucanan | 2,333 | 0 | Dead zone: no towers from any source |
| Camias | 2,110 | 3 | Crowdsourced signal only (no registered tower) |
| Dolores | 1,418 | 0 | Dead zone: no towers from any source |
| Escaler | 983 | 0 | Dead zone: no towers from any source |
| La Paz | 14,246 | 2 | Crowdsourced signal only (no registered tower) |
| Navaling | 1,607 | 0 | Dead zone: no towers from any source |
| San Agustin | 10,380 | 1 | Crowdsourced signal only (no registered tower) |
| San Antonio | 3,237 | 0 | Dead zone: no towers from any source |
| San Franciso | 12,642 | 6 | Crowdsourced signal only (no registered tower) |
| San Ildefonso | 6,680 | 0 | Dead zone: no towers from any source |
| San Isidro | 4,975 | 3 | Crowdsourced signal only (no registered tower) |
| San Jose | 42,438 | 5 | Verified coverage (NTC + crowdsourced) |
| San Miguel | 9,381 | 2 | Crowdsourced signal only (no registered tower) |
| San Nicolas 1st (Pob.) | 1,876 | 2 | Crowdsourced signal only (no registered tower) |
| San Nicolas 2nd | 2,158 | 4 | Crowdsourced signal only (no registered tower) |
| San Pablo (Pob.) | 7,741 | 1 | Crowdsourced signal only (no registered tower) |
| San Pedro I | 707 | 2 | Crowdsourced signal only (no registered tower) |
| San Pedro II | 3,292 | 4 | Crowdsourced signal only (no registered tower) |
| San Roque | 2,593 | 2 | Crowdsourced signal only (no registered tower) |
| San Vicente | 14,531 | 0 | Dead zone: no towers from any source |
| Santa Cruz (Pob.) | 7,645 | 29 | Crowdsourced signal only (no registered tower) |
| Santa Lucia | 22,756 | 2 | Crowdsourced signal only (no registered tower) |
| Santa Maria | 3,135 | 0 | Dead zone: no towers from any source |
| Santo Niño | 5,466 | 0 | Dead zone: no towers from any source |
| Santo Rosario | 1,780 | 1 | Crowdsourced signal only (no registered tower) |
| Turu | 2,229 | 0 | Dead zone: no towers from any source |