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

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zipcodes.pro — CITY/CA/CASTLE-HILL

Castle Hill ZIP codes, California

No ZIP code is named for Castle Hill, CA; addresses there use a neighbouring town's name. 2 ZIP codes cover it: 94595 and 94507. Its area code is 925.

USPS city name
0 ZIP codes
Overlapping the city
2 more
Population
1,026
Area code
925

NANPA lists no telephone rate centre for Castle Hill itself, so these are the area codes of the nearest one, Walnut Creek (0.0 miles). A town on an area-code boundary can differ from its neighbour.

Castle Hill in numbers

About 1,026 people live in Castle Hill, in 353 households. The median household income is $250,000+ a year (US: $80,734). The median owner-occupied home is valued at $2,000,000+. The median age is 43.9; 79.5% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 29 minutes.

Population1,026Castle Hill1,026
Households353Castle Hill353
Median age43.9Castle Hill43.9California37.9US 38.9
Median household income$250,000+Castle Hill$250,000+California$99,122US $80,734
Median home value$2,000,000+Castle Hill$2,000,000+California$734,700US $332,700
Bachelor's degree or higher79.5%Castle Hill79.5%California37.1%US 35.7%
Mean commute29.1 minCastle Hill29.1 minCalifornia28.7 minUS 26.4 min
Population density1,754 / sq miCastle Hill1,754 / sq mi

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

ZIP codes covering Castle Hill

These ZIP codes cover part of Castle Hill but are addressed as somewhere else.

ZIP codes overlapping Castle Hill
ZIP City Type Population Median income Median home
94507 Alamo , CA Standard 14,586 $250,000+ $2,000,000+
94595 Walnut Creek , CA Standard 16,988 $100,552 $860,600

Map of Castle Hill ZIP codes

9450794595

The ZIP codes of Castle Hill, 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 Castle Hill

The nearest larger towns are Saranap (5,662 people, 1.3 mi), San Miguel (3,967 people, 1.4 mi) and Walnut Creek (70,088 people, 2.2 mi).

Towns near Castle Hill
TownPopulationDistance
Saranap 5,662 1.3 mi
San Miguel 3,967 1.4 mi
Walnut Creek 70,088 2.2 mi
Alamo 14,488 2.8 mi
Lafayette 25,285 3.5 mi
Contra Costa Centre 6,893 3.5 mi
Moraga 16,769 4.1 mi
Reliez Valley 3,173 5.1 mi
Pleasant Hill 34,235 5.6 mi
Orinda 19,514 6.0 mi
Danville 43,401 6.5 mi
Concord 124,035 7.4 mi
Pacheco 4,325 7.8 mi
Clayton 10,937 8.3 mi

More nearby: every ZIP code in Contra Costa County · California ZIP codes

Cite this page

zipcodes.pro. “Castle Hill, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/castle-hill

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