| Place Name | Rancho Viejo |
| Place Type | Town |
| ZIP Code(s) | 78520 78575 78586 |
| County | Cameron County |
| Area Code(s) | 956 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 2,425 |
| Population Growth Rate (2010-19) | 16.45% |
| Majority Ethnicity | Hispanic 0.8% |
| Metro/Micro Stats Area | Brownsville-Harlingen, TX |
| US Congressional District(s) | Texas 34th |
| State House Districts | 38 |
| State Senate Districts | 27 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 47.82% |
| African American | 0% |
| Hispanic | 0.8% |
| Asian | 1.54% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 49.85% |