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US ZIP Code Profile

ZIP Code 78009
Castroville, Texas

ZIP code 78009 is in Castroville, located in Medina County, Texas, within the San Antonio-New Braunfels metro area. Its 2020 Census population was 8,715. The estimated median adjusted gross income per tax return is $56,349, and about 9% of filers report $200,000 or more.

2020 Population
8,715
Census ZCTA
County
Medina
FIPS 48325
Median income (est.)
$56,349
IRS SOI 2022
Land Area
71.503 mi²
+ 0.362 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityCastroville, TX
CountyMedina County (FIPS 48325)
StateTexas (FIPS 48)
Metro Area (MSA)San Antonio-New Braunfels, TX Metro Area (41700)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.35725, -98.88666
Land / Water Area71.503 mi² land · 0.362 mi² water

02Income & Economics

Distribution of the 4,620 individual tax returns filed in 78009 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
25.5%
$25K–$50K
21.0%
$50K–$75K
13.6%
$75K–$100K
9.3%
$100K–$200K
21.6%
$200K+
8.9%
The $200,000+ bracket accounts for 35% of 78009's total adjusted gross income, from 9% of returns — a concentration that drives the gap between the median ($56,349) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 78009's IRS income metrics, 2020–2022.

Median income (2021→2022)
$56,349
▲ 4.2%
Filers earning $200K+
8.9%
▲ 0.9 pt
Total filers
4,620
▲ 2.7%
GET /zipc/v2/zipcodes/78009/soi?year=… $49K 2020 $54K 2021 $56K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 78009 ZCTA.

2000
6,646
 
2010
7,255
▲ +9.2%
2020
8,715
▲ +20.1%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number481515
City AliasesCastroville

06Frequently Asked Questions

What county is ZIP code 78009 in?

ZIP code 78009 is in Medina County, Texas (county FIPS code 48325).

What city is ZIP code 78009?

The primary USPS city for 78009 is Castroville, TX.

What metro area (MSA) is 78009 in?

78009 is part of the San Antonio-New Braunfels, TX Metro Area (MSA code 41700).

What is the population of ZIP code 78009?

The 2020 Census population of 78009 was 8,715 residents.

What is the median income in ZIP code 78009?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78009 is about $56,349, with around 9% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.