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Castro Valley, CA
Census-designated place in Alameda County, California. ZIP codes: 94546, 94552, 94578.
Population
65,001
Land area
16.8sq mi
People per sq mi
3,858
ZIP codes
3
Castro Valley and its ZIP codes
Castro Valley at a glance
- Castro Valley is about 15 times as dense as California as a whole.
- It is the 141st most populous of 1,570 cities and towns in California.
- Households here earn a median of $142,779 a year, 44% more than the California figure of $99,122.
- A typical owner-occupied home is valued at $1,104,600 (50% above California) and median rent is $2,554 a month.
Local data for Castro Valley, CA
Counts from official public data
Housing and community stats
Castro Valley, CA, American Community Survey 2020-2024
Median household income
$142,779
Poverty rate
6.7%
Median home value
$1,104,600
Median rent
$2,554/mo
Homeownership
72.5%
Bachelor's or higher
44.5%
Median age
42.9
Average commute
32.7 min
Largest reported origins and ancestries: Chinese Americans (11,019), Mexican Americans (8,503), German Americans (4,225).
Economy and federal money
Jobs, pay, income and spending are for Alameda County. PPP loans are for Castro Valley.
Unemployment rate
4.7%
Sep 2026, -0.2 pts in a year
Average annual pay
$101,979
783,094 jobs, 2025
Income per person
$111,268
BEA, 2024
Federal spending
$42.4B
FY 2026, $25,202 per person
How people get to work
Castro Valley, CA, workers 16 and older. American Community Survey 5-year estimates
- Drove alone62.5%
- Carpooled7.7%
- Public transit5.2%
- Walked1.4%
- Bicycle0.6%
- Taxi, ride-hailing, motorcycle or other1.1%
- Worked from home21.3%
Average one-way commute: 32.7 minutes for people who do not work from home.
Environment and hazard risk
Castro Valley, CA, from FEMA, NOAA and EPA
Natural hazard risk
Very High
Top: earthquake
Storm events since 1996
603
Countywide, mostly strong wind
Flood insurance policies
3,420
0.8% of homes, county
July high / Jan low
75° / 43°F
16.0 inches of rain a year
Health statistics
Share of adults in Castro Valley, CA, CDC PLACES estimates
Obesity
22.9%
U.S. 33.3% -10.4 pts
Diabetes
10.9%
U.S. 12.1% -1.2 pts
Smoking
9.6%
U.S. 12.8% -3.2 pts
Uninsured (18-64)
6.4%
U.S. 11.1% -4.7 pts
ZIP codes in Castro Valley
3 in or overlapping Castro Valley. Population shown
Cities near Castro Valley
| Name | Distance | Land area (sq mi) |
|---|---|---|
| AshlandCensus-designated place | 2.7 mi | 1.8 |
| FairviewCensus-designated place | 2.9 mi | 3 |
| CherrylandCensus-designated place | 3.1 mi | 1.2 |
| San LorenzoCensus-designated place | 4.3 mi | 3 |
| Norris CanyonCensus-designated place | 4.9 mi | 3.6 |
| San LeandroCity | 5.2 mi | 13.3 |
| HaywardCity | 6.2 mi | 45.8 |
| Union CityCity | 8.1 mi | 19.4 |
| San RamonCity | 8.2 mi | 20.1 |
| DanvilleTown | 8.7 mi | 18.1 |
| MoragaTown | 9.2 mi | 9.5 |
| OaklandCity | 9.3 mi | 56 |
| DublinCity | 10 mi | 15.2 |
| AlamedaCity | 10 mi | 10.4 |
| AlamoCensus-designated place | 10 mi | 9.8 |
| DiabloCensus-designated place | 11 mi | 1.4 |
Frequently asked questions
- What county is Castro Valley, CA in?
- Castro Valley is in Alameda County, California.
- What ZIP codes are in Castro Valley, CA?
- ZIP codes in or overlapping Castro Valley include 94546, 94552, 94578.
- What is the population of Castro Valley, CA?
- About 65,001 people live in Castro Valley, based on American Community Survey 5-year estimates.
- What cities are near Castro Valley?
- Nearby places include Ashland (2.7 mi), Fairview (2.9 mi), Cherryland (3.1 mi), San Lorenzo (4.3 mi), Norris Canyon (4.9 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023