Zarraga comprises 24 barangays with an estimated population of 33,067. 7 of its barangays (29%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Balud I | 837 | 8 | Crowdsourced signal only (no registered tower) |
| Balud II | 1,455 | 0 | Dead zone: no towers from any source |
| Balud Lilo-an | 740 | 0 | Dead zone: no towers from any source |
| Dawis Centro | 405 | 6 | Crowdsourced signal only (no registered tower) |
| Dawis Norte | 366 | 3 | Crowdsourced signal only (no registered tower) |
| Dawis Sur | 971 | 2 | Crowdsourced signal only (no registered tower) |
| Gines | 2,413 | 3 | Crowdsourced signal only (no registered tower) |
| Ilawod Poblacion | 2,342 | 5 | Crowdsourced signal only (no registered tower) |
| Ilaya Poblacion | 2,509 | 2 | Crowdsourced signal only (no registered tower) |
| Inagdangan Centro | 1,167 | 2 | Crowdsourced signal only (no registered tower) |
| Inagdangan Norte | 1,316 | 9 | Crowdsourced signal only (no registered tower) |
| Inagdangan Sur | 1,604 | 4 | Crowdsourced signal only (no registered tower) |
| Jalaud Norte | 3,665 | 2 | Crowdsourced signal only (no registered tower) |
| Jalaud Sur | 934 | 0 | Dead zone: no towers from any source |
| Libongcogon | 998 | 0 | Dead zone: no towers from any source |
| Malunang | 1,728 | 1 | Crowdsourced signal only (no registered tower) |
| Pajo | 1,748 | 2 | Crowdsourced signal only (no registered tower) |
| Sambag | 1,883 | 0 | Dead zone: no towers from any source |
| Sigangao | 1,275 | 2 | Crowdsourced signal only (no registered tower) |
| Talauguis | 1,025 | 0 | Dead zone: no towers from any source |
| Talibong | 1,720 | 2 | Crowdsourced signal only (no registered tower) |
| Tubigan | 666 | 3 | Crowdsourced signal only (no registered tower) |
| Tuburan | 232 | 0 | Dead zone: no towers from any source |
| Tuburan Sulbod | 1,068 | 3 | Crowdsourced signal only (no registered tower) |