Santa Teresita comprises 17 barangays with an estimated population of 21,568. 9 of its barangays (53%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Antipolo | 845 | 4 | Crowdsourced signal only (no registered tower) |
| Bihis | 1,086 | 1 | Crowdsourced signal only (no registered tower) |
| Burol | 329 | 0 | Dead zone: no towers from any source |
| Calayaan | 3,855 | 0 | Dead zone: no towers from any source |
| Calumala | 929 | 0 | Dead zone: no towers from any source |
| Cuta East | 1,075 | 3 | Crowdsourced signal only (no registered tower) |
| Cutang Cawayan | 1,467 | 8 | Crowdsourced signal only (no registered tower) |
| Irukan | 208 | 0 | Dead zone: no towers from any source |
| Pacifico | 1,537 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion I | 2,858 | 4 | Crowdsourced signal only (no registered tower) |
| Poblacion II | 937 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion III | 1,092 | 0 | Dead zone: no towers from any source |
| Saimsim | 2,552 | 0 | Dead zone: no towers from any source |
| Sampa | 1,532 | 0 | Dead zone: no towers from any source |
| Sinipian | 149 | 3 | Crowdsourced signal only (no registered tower) |
| Tambo Ibaba | 887 | 0 | Dead zone: no towers from any source |
| Tambo Ilaya | 230 | 0 | Dead zone: no towers from any source |