Olutanga comprises 19 barangays with an estimated population of 25,010. 16 of its barangays (84%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bateria | 690 | 0 | Dead zone: no towers from any source |
| Calais (Kalines) | 1,685 | 2 | Crowdsourced signal only (no registered tower) |
| Esperanza | 872 | 0 | Dead zone: no towers from any source |
| Fama | 1,534 | 1 | Crowdsourced signal only (no registered tower) |
| Galas | 910 | 0 | Dead zone: no towers from any source |
| Gandaan | 1,307 | 0 | Dead zone: no towers from any source |
| Kahayagan | 997 | 0 | Dead zone: no towers from any source |
| Looc Sapi | 1,106 | 0 | Dead zone: no towers from any source |
| Matim | 651 | 0 | Dead zone: no towers from any source |
| Noque | 930 | 0 | Dead zone: no towers from any source |
| Pulo Laum | 468 | 0 | Dead zone: no towers from any source |
| Pulo Mabao | 1,347 | 0 | Dead zone: no towers from any source |
| San Isidro | 839 | 0 | Dead zone: no towers from any source |
| San Jose | 699 | 0 | Dead zone: no towers from any source |
| Santa Maria | 911 | 0 | Dead zone: no towers from any source |
| Solar (Pob.) | 5,601 | 1 | Crowdsourced signal only (no registered tower) |
| Tambanan | 1,733 | 0 | Dead zone: no towers from any source |
| Villacorte | 1,189 | 0 | Dead zone: no towers from any source |
| Villagonzalo | 1,541 | 0 | Dead zone: no towers from any source |