San Mateo comprises 33 barangays with an estimated population of 71,225. 19 of its barangays (58%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bacarreña | 606 | 0 | Dead zone: no towers from any source |
| Bagong Sikat | 588 | 0 | Dead zone: no towers from any source |
| Barangay I (Pob.) | 1,366 | 0 | Dead zone: no towers from any source |
| Barangay II (Pob.) | 438 | 9 | Crowdsourced signal only (no registered tower) |
| Barangay III (Pob.) | 1,037 | 5 | Crowdsourced signal only (no registered tower) |
| Barangay IV (Pob.) | 633 | 2 | Crowdsourced signal only (no registered tower) |
| Bella Luz | 1,063 | 2 | Crowdsourced signal only (no registered tower) |
| Dagupan | 1,718 | 4 | Crowdsourced signal only (no registered tower) |
| Daramuangan Norte | 2,547 | 5 | Crowdsourced signal only (no registered tower) |
| Daramuangan Sur | 1,028 | 1 | Crowdsourced signal only (no registered tower) |
| Estrella | 468 | 6 | Crowdsourced signal only (no registered tower) |
| Gaddanan | 5,358 | 0 | Dead zone: no towers from any source |
| Malasin | 9,840 | 0 | Dead zone: no towers from any source |
| Mapuroc | 845 | 0 | Dead zone: no towers from any source |
| Marasat Grande | 298 | 0 | Dead zone: no towers from any source |
| Marasat Pequeño | 2,326 | 3 | Crowdsourced signal only (no registered tower) |
| Old Centro I | 208 | 0 | Dead zone: no towers from any source |
| Old Centro II | 335 | 0 | Dead zone: no towers from any source |
| Salinungan East | 1,898 | 0 | Dead zone: no towers from any source |
| Salinungan West | 2,737 | 1 | Crowdsourced signal only (no registered tower) |
| San Andres | 1,440 | 0 | Dead zone: no towers from any source |
| San Antonio | 1,668 | 0 | Dead zone: no towers from any source |
| San Ignacio | 406 | 3 | Crowdsourced signal only (no registered tower) |
| San Manuel | 1,702 | 0 | Dead zone: no towers from any source |
| San Marcos | 2,449 | 0 | Dead zone: no towers from any source |
| San Roque | 659 | 0 | Dead zone: no towers from any source |
| Sinamar Norte | 6,419 | 4 | Crowdsourced signal only (no registered tower) |
| Sinamar Sur | 4,255 | 1 | Crowdsourced signal only (no registered tower) |
| Victoria | 7,300 | 0 | Dead zone: no towers from any source |
| Villa Cruz | 1,780 | 0 | Dead zone: no towers from any source |
| Villa Gamiao (Buyon) | 4,397 | 0 | Dead zone: no towers from any source |
| Villa Magat | 942 | 2 | Crowdsourced signal only (no registered tower) |
| Villafuerte | 2,471 | 0 | Dead zone: no towers from any source |