City of Tanjay comprises 24 barangays with an estimated population of 74,189. 4 of its barangays (17%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Azagra | 4,034 | 3 | Crowdsourced signal only (no registered tower) |
| Bahi-an | 540 | 0 | Dead zone: no towers from any source |
| Luca | 1,886 | 1 | Crowdsourced signal only (no registered tower) |
| Manipis | 3,389 | 7 | Crowdsourced signal only (no registered tower) |
| Novallas | 3,969 | 6 | Crowdsourced signal only (no registered tower) |
| Obogon | 2,342 | 1 | Crowdsourced signal only (no registered tower) |
| Pal-ew | 4,034 | 0 | Dead zone: no towers from any source |
| Poblacion I (Barangay 1) | 1,880 | 4 | Crowdsourced signal only (no registered tower) |
| Poblacion II (Barangay 2) | 1,259 | 5 | Crowdsourced signal only (no registered tower) |
| Poblacion III (Barangay 3) | 1,577 | 16 | Crowdsourced signal only (no registered tower) |
| Poblacion IV (Barangay 4) | 2,847 | 50 | Crowdsourced signal only (no registered tower) |
| Poblacion IX (Barangay 9) | 1,321 | 12 | Crowdsourced signal only (no registered tower) |
| Poblacion V (Barangay 5) | 1,162 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion VI (Barangay 6) | 2,950 | 2 | Crowdsourced signal only (no registered tower) |
| Poblacion VII (Barangay 7) | 1,379 | 2 | Crowdsourced signal only (no registered tower) |
| Poblacion VIII (Barangay 8) | 3,948 | 1 | Crowdsourced signal only (no registered tower) |
| Polo | 2,845 | 9 | Crowdsourced signal only (no registered tower) |
| San Isidro | 2,787 | 10 | Crowdsourced signal only (no registered tower) |
| San Jose | 5,778 | 21 | Crowdsourced signal only (no registered tower) |
| San Miguel | 3,822 | 0 | Dead zone: no towers from any source |
| Santa Cruz Nuevo | 2,990 | 1 | Crowdsourced signal only (no registered tower) |
| Santa Cruz Viejo | 5,115 | 9 | Crowdsourced signal only (no registered tower) |
| Santo Niño | 6,255 | 0 | Dead zone: no towers from any source |
| Tugas | 6,080 | 13 | Crowdsourced signal only (no registered tower) |