Castro Valley, California Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Castro Valley, California is 65,389 as of the 2023 American Community Survey, making it the 140th-largest city in California. The median household income is $138,069, the median home value is $1,058,200, and the median age is 42.8.
65,389
Population
3881
People / sq mi
$138,069
Median Income
$1,058,200
Median Home Value
Castro Valley covers 16.8 sq mi of land at 3881 people per square mile.
About Castro Valley, CA
Castro Valley is a city in California with a population of 65,389. It ranks #140 among cities in California by population. The median age is 42.8, older than the national median. The population is 48.7% male and 51.3% female.
The median household income in Castro Valley is $138,069, above the US median of $74,580. 4.8% of residents live below the federal poverty level. Home values sit at a median of $1,058,200, with monthly rent averaging $2,499. The homeownership rate of 71.5% is higher than the national rate of 64.8%.
Educational attainment in Castro Valley reflects 43.9% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 18.4% of workers primarily work from home, noticeably above the national work-from-home rate of 14.2%. The average commute is 33.6 minutes each way.
Race & Ethnicity
| White | 38.3% |
| Black or African American | 8.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.0% |
| Two or More Races | 0.0% |
Economy & Income
$138,069
Median Household Income
$58,843
Per Capita Income
4.8%
Poverty Rate
2.4%
Unemployment Rate
Housing
$1,058,200
Median Home Value
$2,499
Median Rent
71.5%
Owner-Occupied
Education
90.4%
High School+
43.9%
Bachelor's+
Commute
5.9%
Drive Alone
65.7%
Public Transit
18.4%
Work From Home
33.6 min
Avg Commute
Community Profile
11.5%
Foreign Born
58.5%
Non-English at Home
4.3%
Veterans
8.8%
With Disability
95.8%
Health Insurance
97.3%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 25.2% |
| Finance, Insurance & Real Estate | 15.8% |
| Manufacturing | 8.2% |
| Construction | 6.9% |
| Information | 6.6% |
| Retail Trade | 6.4% |
| Education, Health Care & Social Services | 5.5% |
| Public Administration | 5.2% |
| Arts, Entertainment & Food Services | 3.8% |
| Transportation & Warehousing | 3.7% |
| Agriculture & Mining | 0.2% |
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Frequently Asked Questions
Castro Valley, California has a population of 65,389 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 140th-largest city in California.
The median household income in Castro Valley, California is $138,069, with 4.8% of residents living below the federal poverty level.
The median home value in Castro Valley, California is $1,058,200, with median monthly rent at $2,499 and a homeownership rate of 71.5%.
The median age in Castro Valley, California is 42.8 years. The population is 48.7% male and 51.3% female.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.