Census-designated place · California
Castro Valley, California
Castro Valley, census-designated place, in Alameda County, California. Castro Valley had 65,001 people in the ACS 2020-2024 5-year estimates (±2,001). GEOID 0611964.
Residents, 2020-2024
65,001
±2,001 (90% margin)
2020 Census count: 66,441
Median household income
$142,779
±$7,262 (90% margin)
California: $99,122
Median home value
$1,104,600
±$21,750 (90% margin)
California: $734,700
Median gross rent
$2,554
±$105 (90% margin)
California: $2,036
Where is Castro Valley and what county is it in?
Castro Valley is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Alameda County, California. It covers 16.8 square miles of land, 3,944 residents per square mile in 2020.
Castro Valley is in the San Francisco-Oakland-Fremont, CA metropolitan statistical area, which takes in 5 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Castro Valley, and is it growing?
The 2020-2024 American Community Survey puts Castro Valley's population at 65,001 (±2,001). The 2020 Census counted 66,441 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; Castro Valley is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Castro Valley | Alameda County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 65,001 ±2,001 | 1,649,473 | no clear change |
| Households | 22,021 ±735 | 598,246 | no clear change |
| Average household size | 2.90 ±0.08 | 2.70 | +0.13 |
| Housing units | 22,957 ±700 | 637,212 | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Castro Valley?
The median resident of Castro Valley is 42.9 years old; 20.8% are under 18 and 18.8% are 65 or older. The largest group is non-Hispanic white residents at 33.5%, then non-Hispanic Asian residents at 32.9%. 31.0% of residents were born outside the United States.
| Measure | Castro Valley | Alameda County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 42.9 ±1.3 | 39.0 | no clear change |
| Under 18 years | 20.8% ±1.3 pts | 19.8% | – |
| 65 years and over | 18.8% ±1.0 pts | 15.4% | – |
| Male | 49.1% ±1.0 pts | 49.6% | – |
| Hispanic or Latino (any race) | 19.8% ±2.1 pts | 23.4% | +4.8 pts |
| White alone, not Hispanic | 33.5% ±2.1 pts | 27.4% | −9.9 pts |
| Black or African American alone, not Hispanic | 8.7% ±2.1 pts | 9.3% | no clear change |
| Asian alone, not Hispanic | 32.9% ±2.1 pts | 32.7% | +5.8 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.1 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.3% ±0.3 pts | 0.7% | – |
| Two or more races, not Hispanic | 4.6% ±0.8 pts | 5.6% | – |
| Some other race alone, not Hispanic | 0.2% ±0.1 pts | 0.6% | – |
| Born outside the United States | 31.0% ±2.0 pts | 34.7% | +5.3 pts |
| Speak a language other than English at home (age 5+) | 42.2% ±2.3 pts | 47.2% | – |
| Civilian veterans (age 18+) | 3.9% ±0.7 pts | 3.0% | – |
| With a disability | 9.8% ±1.1 pts | 10.3% | – |
| No health insurance coverage | 3.3% ±0.8 pts | 4.0% | no clear change |
| High school graduate or higher (age 25+) | 91.7% ±1.3 pts | 88.8% | – |
| Bachelor's degree or higher (age 25+) | 44.5% ±2.4 pts | 52.2% | no clear change |
| Graduate or professional degree (age 25+) | 17.5% ±1.6 pts | 23.4% | – |
| Lived in the same house a year earlier | 92.1% ±1.4 pts | 87.9% | – |
| Moved from another state in the past year | 1.0% ±0.6 pts | 1.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Castro Valley earn?
Half of Castro Valley's 22,021 households earn less than $142,779 a year (±$7,262), against $129,367 in Alameda County and $99,122 in California. In 2015-2019 it was $133,516 in 2024 dollars; the margins of error cannot tell the two periods apart. 6.7% of residents live below the poverty line.
| Measure | Castro Valley | Alameda County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $142,779 ±$7,262 | $129,367 | no clear change |
| Mean household income | $175,307 ±$7,400 | $177,144 | – |
| Per capita income | $60,688 ±$3,076 | $65,862 | no clear change |
| People below the poverty line | 6.7% ±1.5 pts | 9.2% | no clear change |
| Children under 18 below the poverty line | 5.8% ±3.3 pts | 8.8% | no clear change |
| Households receiving SNAP | 6.7% ±1.3 pts | 9.9% | – |
| Households with a computer | 97.4% ±1.1 pts | 97.4% | – |
| Households with a broadband subscription | 96.7% ±0.9 pts | 94.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Castro Valley?
Owners occupy 72.5% of Castro Valley's occupied homes and renters 27.5%. The median owner-occupied home is valued at $1,104,600 by its owner (±$21,750). The median renter pays $2,554 a month including utilities, and 45.6% of renters pay 35% or more of their income on rent.
| Measure | Castro Valley | Alameda County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $1,104,600 ±$21,750 | $1,090,100 | +$192,040 |
| Median gross rent | $2,554 ±$105 | $2,357 | +$350 |
| Renters paying 35% or more of income on rent | 45.6% ±5.5 pts | 41.8% | no clear change |
| Median monthly owner costs, with a mortgage | $3,627 ±$152 | $3,810 | – |
| Owner-occupied homes | 72.5% ±2.2 pts | 54.4% | no clear change |
| Renter-occupied homes | 27.5% ±2.2 pts | 45.6% | – |
| Housing units | 22,957 ±700 | 637,212 | no clear change |
| Homeowner vacancy rate | 0.4% ±0.6 pts | 0.8% | – |
| Rental vacancy rate | 5.8% ±2.8 pts | 5.7% | – |
| Single-family detached homes | 73.3% ±2.2 pts | 51.0% | – |
| Mobile homes | 1.5% ±0.6 pts | 1.3% | – |
| Built 2020 or later | 0.7% ±0.4 pts | 1.4% | – |
| Built 2010 to 2019 | 2.5% ±0.8 pts | 6.8% | – |
| Built 1939 or earlier | 3.1% ±0.7 pts | 19.6% | – |
| Households with no vehicle | 5.5% ±1.3 pts | 10.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Castro Valley work and get to work?
62.5% of Castro Valley's workers drive alone and 21.3% work from home. The average trip to work takes 32.7 minutes. The unemployment rate in 2020-2024 averaged 3.8%.
| Measure | Castro Valley | Alameda County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 64.1% ±1.6 pts | 66.9% | – |
| Unemployment rate | 3.8% ±0.7 pts | 5.4% | no clear change |
| Drove alone to work | 62.5% ±2.4 pts | 52.6% | – |
| Carpooled | 7.7% ±1.5 pts | 8.3% | – |
| Public transportation | 5.2% ±1.7 pts | 7.7% | – |
| Walked | 1.4% ±0.6 pts | 2.8% | – |
| Worked from home | 21.3% ±2.2 pts | 25.7% | +15.4 pts |
| Mean travel time to work | 32.7 min ±1.3 | 31.0 min | −3.6 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Castro Valley?
12 census tracts lie mostly in Castro Valley, and 4 more reach into it (2020 census blocks). Their median household incomes run from $103,750 (Tract 4310) to $214,477 (Tract 4301.01).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 4302Alameda County | 7,195 | $181,136 |
| Tract 4305Alameda County | 6,125 | $114,408 |
| Tract 4306Alameda County | 6,105 | $193,606 |
| Tract 4301.01Alameda County | 6,562 | $214,477 |
| Tract 4308Alameda County | 5,887 | $106,016 |
| Tract 4309Alameda County | 5,539 | $120,000 |
| Tract 4312Alameda County | 6,033 | $122,872 |
| Tract 4307Alameda County | 4,132 | $145,521 |
| Tract 4303Alameda County | 4,028 | $175,772 |
| Tract 4310Alameda County | 3,191 | $103,750 |
| Tract 4311Alameda County | 3,368 | $106,473 |
| Tract 4351.03Alameda County | 7,020 | $189,638 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Castro Valley) · Census block assignment files
How does Castro Valley compare with other places in California?
Castro Valley ranks 170th of 1,037 places in California with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 141st | 1,076 |
| Residents per square mile | 323rd | 1,077 |
| Median household income | 170th | 1,037 |
| Per capita income | 266th | 1,073 |
| Median home value | 188th | 1,054 |
| Median gross rent | 180th | 987 |
| Poverty rate | 665th | 836 |
| Bachelor's degree or higher | 293rd | 988 |
| Median age | 384th | 1,075 |
| Owner-occupied share | 390th | 1,064 |
| Work from home | 267th | 822 |
| Travel time to work | 246th | 1,069 |
Castro Valley's figures with every place in California (CSV)
Every place in California, sortable · Compare Castro Valley with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Castro Valley?
3 of the 57 figures for Castro Valley on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Castro Valley are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.