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/CA/CASTROVILLE

Castroville ZIP code, California

The ZIP code for Castroville, CA is 95012, and its area code is 831.

USPS city name
1 ZIP code
Population
6,720
Area code
831

Castroville in numbers

About 6,720 people live in Castroville, in 1,579 households. The median household income is $89,354 a year, 10% below the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $617,100 (16% below the California median), and median gross rent is $1,948 a month. The median age is 30.4; 5.0% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 27 minutes.

Population6,720Castroville6,720
Households1,579Castroville1,579
Median age30.4Castroville30.4California37.9US 38.9
Median household income$89,354Castroville$89,354California$99,122US $80,734
Median home value$617,100Castroville$617,100California$734,700US $332,700
Median gross rent$1,948Castroville$1,948California$2,036US $1,413
Bachelor's degree or higher5.0%Castroville5.0%California37.1%US 35.7%
Mean commute26.8 minCastroville26.8 minCalifornia28.7 minUS 26.4 min
Population density6,582 / sq miCastroville6,582 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Castroville CDP. 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
95012 Castroville , CA Standard 10,814 $80,288 $598,900

Map of Castroville ZIP codes

95012

The ZIP codes of Castroville, CA, 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 Marina (22,563 people, 6.2 mi), Prunedale (19,723 people, 6.3 mi) and Salinas (161,761 people, 8.4 mi).

Towns near Castroville
TownPopulationDistance
Marina 22,563 6.2 mi
Prunedale 19,723 6.3 mi
Las Lomas 3,355 7.3 mi
Salinas 161,761 8.4 mi
Pajaro 2,899 9.5 mi
Aromas 3,245 10.2 mi
Seaside 31,814 10.3 mi
Watsonville 51,712 11.0 mi
Freedom 3,172 12.3 mi
Interlaken 8,068 12.9 mi
Monterey 29,613 13.4 mi
Amesti 2,818 13.5 mi
Pacific Grove 14,951 13.7 mi
Rio del Mar 9,201 15.2 mi

More nearby: every ZIP code in Monterey County · California ZIP codes

Cite this page

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

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