| Place Name | Mertens |
| Place Type | Town |
| ZIP Code(s) | 76666 |
| County | Hill County |
| Area Code(s) | 430,903 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 89 |
| Population Growth Rate (2010-19) | 15.20% |
| Majority Ethnicity | White 67.59% |
| US Congressional District(s) | Texas 25th |
| State House Districts | 8 |
| State Senate Districts | 22 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 67.59% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 32.41% |