Residential delivery area · Texas
ZIP Code 78009: Castroville, TX
ZIP code 78009 uses the postal name Castroville, Texas and lies entirely in Medina County (Census 2020 ZIP-county file). About 9,200 people live there (Census Bureau, ACS 2020-2024). Median household income is $103,125 (Census Bureau, ACS 2020-2024). By Census place, 4% of its land lies in Castroville; 96% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Castroville · its only residential ZIP
- County
- Medina County
- Census places
- Castroville
- Metro area
- San Antonio-New Braunfels, TX
- House district
- TX-23 119th Congress
- State
- Texas
- Time zone
- Central
- Land area
- 70.5 sq mi · 130 people per sq mi
Where is ZIP code 78009?
78009 centers on 29.368°, -98.890° and covers 70.5 square miles of land plus 0.3 of water. It borders 6 ZIP codes: 78039, 78066, 78245, 78253, 78016, 78861.
The map draws ZIP code areas only. For the streets inside 78009, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 78009 compare with the rest of Medina County?
| Measure | 78009 | In Medina County | In TX |
|---|---|---|---|
| People (ACS 2020-2024) | 9,151 | 6th of 15 | 847th of 1,990 |
| Median household income | $103k | 4th of 9 | 209th of 1,172 |
| Median home value | $369k | 3rd of 10 | 240th of 1,172 |
Its median household income is higher than in 83% of U.S. residential ZIP codes, and it is denser than 57% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 78009?
The 2020 Census counted 8,715 people in 78009; the ACS, which samples households over 2020-2024, estimates 9,151. Between the 2010 and 2020 censuses its population grew 20.1% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 9,151±989 (90% margin)
- 2020 Census count
- 8,715+20.1% since 2010 (7,255)
- Households
- 2,980
- Median age
- 43.1
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 78009?
Of the 9,151 people the ACS estimates in 78009, 19.2% are under 18 and 16.9% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (51.3%), then White (not Hispanic) (38.5%).
- Under 1819.2%
- 18 to 6463.9%
- 65 and older16.9%
- Hispanic or Latino51.3%
- White, not Hispanic38.5%
- Other or two or more5.0%
- Black, not Hispanic2.6%
- Asian, not Hispanic2.6%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 78009 earn?
Median household income is $103,125 (ACS 2020-2024), the 4th highest of the 9 ranked ZIP codes in Medina County. It rose from $72,056 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $103,125±$13,795
- Income per person
- $41,228
- Below the poverty line
- 4.2%
- Unemployed (of the labor force)
- 3.1%
- Adults 25+ with a bachelor's degree
- 29.9%
- Adjusted gross income per tax return, 2022
- $88,8364,620 returns; wages 67% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 78009?
FHFA's house price index for 78009, built from repeat sales and appraisals of the same homes, rose 89% from 2015 to 2025 and rose 41% from 2020 to 2025, and moved −4.0% in 2025.
- Median home value (owners' estimate)
- $368,700
- Median gross rent
- $1,250
- Homes owned by their occupants
- 86.0%
- Housing units
- 3,396
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 78009?
204 business establishments had a location in this ZIP code in 2023, 31 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction32
- Accommodation and food services29
- Retail trade28
- Other services (except public administration)26
- Health care and social assistance22
- Professional, scientific, and technical services21
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 78009?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 78039 | La Coste | 1,862 | $96k | 5.1 mi |
| 78066 | Rio Medina | 259 | $88k | 8.7 mi |
| 78245 | San Antonio | 96,015 | $90k | 9.1 mi |
| 78253 | San Antonio | 69,282 | $106k | 9.4 mi |
| 78016 | Devine | 11,670 | $61k | 13.4 mi |
| 78861 | Hondo | 14,008 | $65k | 16.3 mi |
| 78002 | Atascosa | 7,035 | $67k | 10.8 mi (near) |
| 78252 | San Antonio | 21,790 | $86k | 12.2 mi (near) |
| 78056 | Mico | 2,526 | $120k | 12.4 mi (near) |
| 78059 | Natalia | 7,061 | $75k | 12.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.