Maria comprises 22 barangays with an estimated population of 13,360. 14 of its barangays (64%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bogo | 544 | 1 | Crowdsourced signal only (no registered tower) |
| Bonga | 364 | 0 | Dead zone: no towers from any source |
| Cabal-asan | 456 | 0 | Dead zone: no towers from any source |
| Calunasan | 603 | 0 | Dead zone: no towers from any source |
| Candaping A | 552 | 0 | Dead zone: no towers from any source |
| Candaping B | 547 | 3 | Crowdsourced signal only (no registered tower) |
| Cantaroc A | 452 | 0 | Dead zone: no towers from any source |
| Cantaroc B | 794 | 3 | Crowdsourced signal only (no registered tower) |
| Cantugbas | 504 | 0 | Dead zone: no towers from any source |
| Lico-an | 316 | 0 | Dead zone: no towers from any source |
| Lilo-an | 1,327 | 0 | Dead zone: no towers from any source |
| Logucan | 454 | 0 | Dead zone: no towers from any source |
| Looc | 571 | 0 | Dead zone: no towers from any source |
| Minalulan | 668 | 2 | Crowdsourced signal only (no registered tower) |
| Nabutay | 579 | 7 | Crowdsourced signal only (no registered tower) |
| Olang | 576 | 4 | Crowdsourced signal only (no registered tower) |
| Pisong A | 638 | 0 | Dead zone: no towers from any source |
| Pisong B | 399 | 0 | Dead zone: no towers from any source |
| Poblacion Norte | 1,289 | 2 | Verified coverage (NTC + crowdsourced) |
| Poblacion Sur | 562 | 1 | Registered tower only (not crowd-verified) |
| Saguing | 714 | 0 | Dead zone: no towers from any source |
| Sawang | 451 | 0 | Dead zone: no towers from any source |