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Castle Hill, CA
Census-designated place in Contra Costa County, California. ZIP codes: 94595.
Population
1,026
Land area
0.6sq mi
People per sq mi
1,755
ZIP codes
1
Castle Hill and its ZIP codes
Castle Hill at a glance
- Castle Hill is about 7 times as dense as California as a whole.
- The median household income is more than $250,000, the highest bracket the Census Bureau reports.
- A typical owner-occupied home is valued at more than $2,000,000.
Housing and community stats
Castle Hill, CA, American Community Survey 2020-2024
Median household income
$250,000+
Poverty rate
0.2%
Median home value
$2,000,000+
Homeownership
91.2%
Bachelor's or higher
79.5%
Median age
43.9
Average commute
29.1 min
Largest reported origins and ancestries: Greek Americans (82), Ukrainian Americans (79), Indian Americans (77).
Economy and federal money
Jobs, pay, income and spending are for Contra Costa County. PPP loans are for Castle Hill.
Unemployment rate
5.0%
Aug 2026, -0.2 pts in a year
Average annual pay
$87,200
374,448 jobs, 2025
Income per person
$108,259
BEA, 2024
Federal spending
$7.1B
FY 2026, $6,088 per person
How people get to work
Castle Hill, CA, workers 16 and older. American Community Survey 5-year estimates
- Drove alone31.6%
- Carpooled0.0%
- Public transit0.0%
- Walked0.0%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other5.6%
- Worked from home62.8%
Average one-way commute: 29.1 minutes for people who do not work from home.
Environment and hazard risk
Castle Hill, CA, from FEMA, NOAA and EPA
Natural hazard risk
Very High
Top: earthquake
Storm events since 1996
472
Countywide, mostly strong wind
Flood insurance policies
2,681
0.9% of homes, county
July high / Jan low
83° / 42°F
26.1 inches of rain a year
Health statistics
Share of adults in Castle Hill, CA, CDC PLACES estimates
Obesity
25.2%
U.S. 33.3% -8.1 pts
Diabetes
9.9%
U.S. 12.1% -2.2 pts
Smoking
6.8%
U.S. 12.8% -6.0 pts
Uninsured (18-64)
3.4%
U.S. 11.1% -7.7 pts
ZIP codes in Castle Hill
1 in or overlapping Castle Hill. Population shown
Cities near Castle Hill
| Name | Distance | Land area (sq mi) |
|---|---|---|
| San MiguelCensus-designated place | 1.3 mi | 1.1 |
| SaranapCensus-designated place | 1.5 mi | 1.1 |
| Acalanes RidgeCensus-designated place | 2.7 mi | 0.5 |
| Shell RidgeCensus-designated place | 2.7 mi | 0.4 |
| Walnut CreekCity | 2.7 mi | 19.8 |
| AlamoCensus-designated place | 3.1 mi | 9.8 |
| Contra Costa CentreCensus-designated place | 3.8 mi | 0.6 |
| MoragaTown | 3.8 mi | 9.5 |
| LafayetteCity | 3.9 mi | 15 |
| North GateCensus-designated place | 4 mi | 0.7 |
| Reliez ValleyCensus-designated place | 5 mi | 2.4 |
| Pleasant HillCity | 5.7 mi | 7.1 |
| DiabloCensus-designated place | 5.9 mi | 1.4 |
| DanvilleTown | 6.1 mi | 18.1 |
| OrindaCity | 6.2 mi | 12.9 |
| Alhambra ValleyCensus-designated place | 7.6 mi | 1.6 |
Frequently asked questions
- What county is Castle Hill, CA in?
- Castle Hill is in Contra Costa County, California.
- What ZIP codes are in Castle Hill, CA?
- ZIP codes in or overlapping Castle Hill include 94595.
- What is the population of Castle Hill, CA?
- About 1,026 people live in Castle Hill, based on American Community Survey 5-year estimates.
- What cities are near Castle Hill?
- Nearby places include San Miguel (1.3 mi), Saranap (1.5 mi), Acalanes Ridge (2.7 mi), Shell Ridge (2.7 mi), Walnut Creek (2.7 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023