| Place Name | San Mateo |
| Place Type | Census Designated Place |
| ZIP Code(s) | 87020 |
| County | Cibola County |
| Area Code(s) | 505 |
| Timezone | Mountain Standard Time (MST) |
| Population (2022) | 77 |
| Population Growth Rate (2010-19) | -13.66% |
| Majority Ethnicity | White 72.08% |
| Metro/Micro Stats Area | Grants, NM |
| US Congressional District(s) | New Mexico 2nd |
| State House Districts | 69 |
| State Senate Districts | 30 |
| Race/Ethnicy | Percentage of Population (2018) |
|---|---|
| White | 72.08% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 27.92% |