Castroville is a city in Medina County, Texas, home to about 3,092 people across 2.9 square miles. Its ZIP code is 78009.
Homes sold for a median of $194 per square foot in the three months ending August 2026, a balanced market.
Each card is that ZIP code’s whole market, including any part outside Castroville. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Castroville’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)28 miles away |
|---|---|
| Nearest city of 250,000+ | San Antonio, TX23 miles away |
Straight-line distances from the center of Castroville; 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.
Castroville had 2,954 residents in the 2020 census, up 11% since 2000.
It’s the 568th largest of 1,778 towns in Texas by population.
Medina County grew from 7,783 residents in 1900 to 50,748 in 2020.
Medina 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 42°F. About 29.7 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Lytle 3w, TX weather station (9 miles away).
8,249 jobs at 856 businesses in Medina County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
54 doctors and other health care providers list an office in Castroville.
Nearest hospitals
Providers with an office here
| Primary care doctors | 11 |
|---|---|
| Specialist doctors | 3 |
| Dentists | 5 |
| Nurse practitioners and physician assistants | 12 |
| Mental health providers | 9 |
| Physical and occupational therapists | 10 |
| Optometrists | 1 |
| Chiropractors | 3 |
| Pharmacies | 3 |
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 (3 nearby)
Grocery stores (1 nearby)
Theaters and performance venues (1 nearby)
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.
Established in 1844.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Medina Valley ISD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Castroville ElCastroville | Pre-K–5 | 600 | Public | 0.2 mi |
| Medina Valley MiddleCastroville | 6–8 | 1,157 | Public | 2.7 mi |
| Medina Valley H SCastroville | 9–12 | 2,626 | Public | 3.1 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| St Louis Catholic SchoolCastroville | Pre-K–5 | 158 | 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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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.