Santa Teresita comprises 13 barangays with an estimated population of 22,232. 7 of its barangays (54%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Alucao | 495 | 1 | Crowdsourced signal only (no registered tower) |
| Aridowen | 921 | 0 | Dead zone: no towers from any source |
| Buyun | 3,371 | 0 | Dead zone: no towers from any source |
| Caniugan | 1,413 | 0 | Dead zone: no towers from any source |
| Centro East (Pob.) | 1,231 | 1 | Crowdsourced signal only (no registered tower) |
| Centro West | 1,549 | 0 | Dead zone: no towers from any source |
| Dungeg | 537 | 0 | Dead zone: no towers from any source |
| Luga | 1,281 | 4 | Crowdsourced signal only (no registered tower) |
| Masi | 1,619 | 0 | Dead zone: no towers from any source |
| Mission | 1,315 | 0 | Dead zone: no towers from any source |
| Simbaluca | 2,034 | 4 | Crowdsourced signal only (no registered tower) |
| Simpatuyo | 4,688 | 6 | Crowdsourced signal only (no registered tower) |
| Villa | 1,778 | 1 | Crowdsourced signal only (no registered tower) |