Castle Hills is a city in Bexar County, Texas, home to about 3,943 people across 2.5 square miles. It has no ZIP code of its own: it’s part of 78213.
Homes sold for a median of $164 per square foot in the three months ending August 2026, a balanced market.
Mostly San Antonio; part is in Castle Hills
Each card is that ZIP code’s whole market, including any part outside Castle Hills. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Castle Hills’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | San Antonio International Airport (SAT)4 miles away |
|---|---|
| Nearest city of 250,000+ | San Antonio, TX4 miles away |
Straight-line distances from the center of Castle Hills; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Castle Hills had 3,978 residents in the 2020 census, down 5% since 2000.
It’s the 497th largest of 1,778 towns in Texas by population.
Bexar County grew from 69,422 residents in 1900 to 2,009,324 in 2020.
Bexar County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 96°F in summer, and winter lows average 41°F. About 32.5 inches of rain and melted snow fall in a typical year, with about 0 inches of snow.
Source: NOAA 1991–2020 climate normals, San Antonio Intl Ap, TX weather station (3 miles away).
821,509 jobs at 39,726 businesses in Bexar County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
409 doctors and other health care providers list an office in Castle Hills.
Nearest hospitals
Providers with an office here
| Primary care doctors | 18 |
|---|---|
| Specialist doctors | 21 |
| Dentists | 23 |
| Nurse practitioners and physician assistants | 66 |
| Mental health providers | 238 |
| Physical and occupational therapists | 28 |
| Optometrists | 8 |
| Chiropractors | 7 |
| Pharmacies | 8 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (4 nearby)
Grocery stores (1 nearby)
Pharmacies (1 nearby)
Libraries
Museums
Theaters and performance venues
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by San Antonio ISD, North East ISD, Compass Rose Public Schools and others. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Arnold ElSan Antonio | Pre-K–5 | 633 | Public | 2.3 mi |
| Castle Hills ElSan Antonio | Pre-K–5 | 439 | Public | 0.5 mi |
| Compass Rose DreamSan Antonio | Pre-K–7 | 326 | Charter | 2.5 mi |
| Dellview ElSan Antonio | Pre-K–5 | 326 | Public | 1.9 mi |
| Larkspur ElSan Antonio | Pre-K–5 | 849 | Public | 1.4 mi |
| Legacy Traditional - Basse PriSan Antonio | Pre-K–5 | 250 | Charter | 2.6 mi |
| Olmos ElSan Antonio | Pre-K–5 | 486 | Public | 2.0 mi |
| Pre-K Academy at West AvenueSan Antonio | Pre-K | 391 | Public | 1.5 mi |
| Compass Rose OpportunitySan Antonio | K–12 | 95 | Charter | 2.5 mi |
| Jackson-Keller ElSan Antonio | K–5 | 552 | Public | 1.0 mi |
| Stepping Stones AcademySan Antonio | 2–12 | 9 | Charter, Alternative Education | 2.4 mi |
| Legacy Traditional- Basse SecondarySan Antonio | 6–12 | 164 | Charter | 2.6 mi |
| Compass Rose ImpactSan Antonio | 9–12 | 103 | Charter, Alternative Education | 2.5 mi |
| International School of AmericaSan Antonio | 9–12 | 493 | Public | 1.3 mi |
| Legacy of Educational Excellence H SSan Antonio | 9–12 | 2,285 | Public | 1.3 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| St George Episcopal SchoolSan Antonio | Pre-K–8 | 507 | Episcopal | 0.6 mi |
| St Gregory the Great Catholic SchoolSan Antonio | Pre-K–8 | 136 | Roman Catholic | 2.0 mi |
| The Christian School at Castle HillsSan Antonio | Pre-K–12 | 565 | Christian (no specific denomination) | 0.7 mi |
| Antonian College Preparatory High SchoolSan Antonio | 9–12 | 717 | Roman Catholic | 0.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with San Antonio.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.