| Place Name | Castle Hills |
| Place Type | City |
| ZIP Code(s) | 78213 |
| County | Bexar County |
| Area Code(s) | 210,726 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 4,164 |
| Population Growth Rate (2010-19) | -3.35% |
| Majority Ethnicity | White 57.66% |
| Metro/Micro Stats Area | San Antonio-New Braunfels, TX |
| US Congressional District(s) | Texas 21st |
| State House Districts | 123 |
| State Senate Districts | 25 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 57.66% |
| African American | 0.6% |
| Hispanic | 0% |
| Asian | 3.21% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 38.54% |