Mercedes comprises 26 barangays with an estimated population of 50,760. 25 of its barangays (96%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Apuao | 381 | 0 | Dead zone: no towers from any source |
| Barangay I (Pob.) | 1,142 | 0 | Dead zone: no towers from any source |
| Barangay II (Pob.) | 2,452 | 0 | Dead zone: no towers from any source |
| Barangay III (Pob.) | 1,505 | 0 | Dead zone: no towers from any source |
| Barangay IV (Pob.) | 520 | 0 | Dead zone: no towers from any source |
| Barangay V (Pob.) | 1,163 | 0 | Dead zone: no towers from any source |
| Barangay VI (Pob.) | 403 | 0 | Dead zone: no towers from any source |
| Barangay VII (Pob.) | 506 | 0 | Dead zone: no towers from any source |
| Caringo | 744 | 0 | Dead zone: no towers from any source |
| Catandunganon | 5,966 | 0 | Dead zone: no towers from any source |
| Cayucyucan | 1,096 | 0 | Dead zone: no towers from any source |
| Colasi | 832 | 0 | Dead zone: no towers from any source |
| Del Rosario (Tagongtong) | 3,579 | 1 | Crowdsourced signal only (no registered tower) |
| Gaboc | 1,156 | 0 | Dead zone: no towers from any source |
| Hamoraon | 930 | 0 | Dead zone: no towers from any source |
| Hinipaan | 2,976 | 0 | Dead zone: no towers from any source |
| Lalawigan | 1,687 | 0 | Dead zone: no towers from any source |
| Lanot | 972 | 0 | Dead zone: no towers from any source |
| Mambungalon | 1,422 | 0 | Dead zone: no towers from any source |
| Manguisoc | 3,975 | 0 | Dead zone: no towers from any source |
| Masalongsalong | 1,092 | 0 | Dead zone: no towers from any source |
| Matoogtoog | 3,214 | 0 | Dead zone: no towers from any source |
| Pambuhan | 794 | 0 | Dead zone: no towers from any source |
| Quinapaguian | 331 | 0 | Dead zone: no towers from any source |
| San Roque | 10,641 | 0 | Dead zone: no towers from any source |
| Tarum | 1,281 | 0 | Dead zone: no towers from any source |