Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/TX/CASTROVILLE

Castroville ZIP code, Texas

The ZIP code for Castroville, TX is 78009, and its area code is 830.

USPS city name
1 ZIP code
Population
3,092
Area code
830
State
Texas

Castroville in numbers

About 3,092 people live in Castroville, in 1,211 households. The median household income is $78,460 a year, about the same as the Texas median of $78,476 (US: $80,734). The median owner-occupied home is valued at $300,000 (6% above the Texas median), and median gross rent is $1,253 a month. The median age is 48.8; 27.9% of adults 25 and over hold a bachelor's degree or higher (33.8% across Texas); the average commute takes 30 minutes.

Population3,092Castroville3,092
Households1,211Castroville1,211
Median age48.8Castroville48.8Texas35.6US 38.9
Median household income$78,460Castroville$78,460Texas$78,476US $80,734
Median home value$300,000Castroville$300,000Texas$283,800US $332,700
Median gross rent$1,253Castroville$1,253Texas$1,403US $1,413
Bachelor's degree or higher27.9%Castroville27.9%Texas33.8%US 35.7%
Mean commute30.1 minCastroville30.1 minTexas26.7 minUS 26.4 min
Population density872 / sq miCastroville872 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Castroville city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Castroville

ZIP codes with the USPS city name Castroville
ZIP City Type Population Median income Median home
78009 Castroville , TX Standard 9,151 $103,125 $368,700

Map of Castroville ZIP codes

78009

The ZIP codes of Castroville, TX, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Castroville

The nearest larger towns are Lackland AFB (6,785 people, 14 mi), Devine (4,476 people, 15 mi) and Leon Valley (11,446 people, 17 mi).

Towns near Castroville
TownPopulationDistance
Lackland AFB 6,785 14.4 mi
Devine 4,476 15.1 mi
Leon Valley 11,446 17.2 mi
Helotes 9,630 18.4 mi
Hondo 8,713 18.5 mi
Lakehills 6,130 19.2 mi
Balcones Heights 2,715 20.5 mi
San Antonio 1,479,835 21.1 mi
Cross Mountain 3,752 23.0 mi
Castle Hills 3,943 23.2 mi
Shavano Park 3,670 23.7 mi
Alamo Heights 7,492 24.8 mi
Terrell Hills 5,070 25.8 mi
Scenic Oaks 10,569 26.3 mi

More nearby: every ZIP code in Medina County · Texas ZIP codes

Cite this page

zipcodes.pro. “Castroville, TX ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/tx/castroville

Underlying data is public domain or openly licensed — sources, vintages and licences.