| Place Name | Mercedes |
| Place Type | City |
| ZIP Code(s) | 78570 |
| County | Hidalgo County |
| Area Code(s) | 956 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 15,803 |
| Population Growth Rate (2010-19) | 4.42% |
| Majority Ethnicity | Hispanic 0.04% |
| Metro/Micro Stats Area | McAllen-Edinburg-Mission, TX |
| US Congressional District(s) | Texas 15th |
| State House Districts | 39 |
| State Senate Districts | 27 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 41.35% |
| African American | 0.07% |
| Hispanic | 0.04% |
| Asian | 0.02% |
| Native American | 0.01% |
| Hawaiin/Pacific Islander | 58.51% |