2024 presidential election
Castro Valley
HarrisD+38.7
How it voted
Share of the 2024 vote
| Kamala Harris ✓Democratic | 67.4% | 20,668 |
|---|---|---|
| Donald TrumpRepublican | 28.7% | 8,805 |
| OtherAll other candidates | 3.8% | 1,176 |
D+60R+60
City boundary, filled by its own 2024 D-vs-R margin — precinct detail where available, over the 1 county it's drawn from (shown faint).
The precinct map shows the 2024 presidential vote; the timeline scrubs the city’s overall result across 2008–2024, on current city boundaries.
presidential history
Presidential margin, 2008–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 2008 | +38.7% |
| 2012 | +40.0% |
| 2016 | +44.2% |
| 2020 | +45.1% |
| 2024 | +38.7% |
DemocraticRepublican
5 presidential elections
| Year | Won | Democratic | Republican | Other | Margin | Total |
|---|---|---|---|---|---|---|
| D | 67.4%Harris20,668 | 28.7%Trump8,805 | 3.8% | 30,649 | ||
| D | 71.3%Biden25,100 | 26.2%Trump9,231 | 2.4%incl. Jorgensen | 35,182 | ||
| D | 68.9%Clinton20,129 | 24.7%Trump7,223 | 6.3%incl. Johnson | 29,199 | ||
| D | 70.0%Obama18,746 | 30.0%Romney8,037 | 0.0% | 26,783 | ||
| D | 69.3%Obama19,964 | 30.6%McCain8,810 | 0.2% | 28,823 |
Demographics
Demographic profile
Demographic Profile
Key indicators compared across containing geographies
| Indicator | Castro ValleyCity | CaliforniaState | United StatesNation |
|---|---|---|---|
| Race & Ethnicity | |||
| White | 35.9% | 39.7% | 61.0% |
| Black | 8.8% | 5.4% | 12.2% |
| Asian | 33.2% | 15.5% | 6.0% |
| Two or more races | 13.0% | 19.2% | 12.6% |
| Other race | 8.8% | 20.1% | 8.2% |
| Hispanic or Latino | 19.8% | 40.1% | 19.3% |
| Income & Age | |||
| Median household income | $142,779 | $99,122 | $84,427 |
| Poverty rate | 6.7% | 12.0% | 12.5% |
| Median age | 42.9 | 37.9 | 39.1 |
| Age 18–24 | 8.0% | 9.1% | 9.2% |
| Age 65 and older | 15.4% | 15.6% | 17.2% |
| Education & Language | |||
| Bachelor's degree or higher (25+) | 52.2% | 36.6% | 35.6% |
| Speaks a non-English language at home | 47.2% | 44.4% | 22.3% |
| Spanish | 16.7% | 28.4% | 13.6% |
| Chinese (incl. Mandarin & Cantonese) | 9.3% | 3.5% | 1.1% |
| Other Indo-European | 7.3% | 3.4% | 2.0% |
| Other Asian & Pacific Island | 4.5% | 2.0% | 1.1% |
| Ancestry | |||
| Largest ancestry | Mexican 16.2% | Mexican 32.3% | German 12.5% |
| 2nd-largest ancestry | Chinese 10.6% | German 6.8% | Mexican 11.3% |
| 3rd-largest ancestry | Asian Indian 9.3% | English 6.3% | English 9.5% |
| Religion | |||
| Catholic | 19.2%County context | 26.2% | 18.6% |
| Evangelical Protestant | 7.1%County context | 9.0% | 16.5% |
| Unaffiliated or unclaimed | 58.8%County context | 55.2% | 51.5% |
ACS values are survey estimates and may include margins of error.
Religion data may be available only at county or larger geographies. Sub-county values are labeled when inherited, modeled, or contextual.
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the origins and ancestries reported within it.
Reported ancestry · ACS B04006
German
5.8%
English
5.5%
Irish
5.4%
Italian
3.0%
American
1.8%
French
1.3%
Portuguese
1.3%
Polish
1.1%
Detailed group · ACS B02015
Chinese
10.6%
Asian Indian
9.3%
Filipino
5.2%
Vietnamese
1.9%
Korean
1.2%
Japanese
0.7%
Taiwanese
0.6%
Pakistani
0.4%
Specific origin · ACS B03001
Mexican
16.2%
Salvadoran
1.4%
Guatemalan
1.3%
Puerto Rican
0.7%
Nicaraguan
0.5%
Spaniard
0.4%
Spanish
0.4%
Honduran
0.3%
The ACS does not publish subgroup detail for people reporting two or more races.
Reported ancestry · ACS B04006
African American identity is recorded by the ACS race question; the ancestry item enumerates specific African and Caribbean ancestries only.
African
0.4%
Ethiopian
0.4%
Nigerian
0.3%
Jamaican
0.2%
Tribal grouping · detailed group · ACS B02020 · B02016
American Indian, Alaska Native, Native Hawaiian, Pacific Islander, and other single-race responses combined.
Aztec
0.3%
Maya
0.2%
Fijian
0.2%
Source · American Community Survey 5-year estimates, 2024 release. Race shares: B02001 · B03003. Subgroup detail: B03001 (Hispanic or Latino specific origin), B02015 (Asian groups), B02020 · B02016 (American Indian/Alaska Native tribes and Pacific Islander groups), B04006 (reported ancestry). Hispanic/Latino is an ethnicity that overlaps the race categories, so group shares can total more than 100%. All subgroup rows are shares of total population; ancestry is self-reported and multiple-response, so rows do not sum to the parent group's share.
2024 ACS
Age distribution by sex
Median age: 42.9 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
Inflation-adjusted dollars
$142,779
Castro Valley$142,779
California$99,122
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
6.7%
Child poverty is below the national average.
Children under 188.8%
Working age (18–64)9.0%
Seniors (65+)13.2%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
52.8%
speak English only
Spanish16.7%
Chinese (incl. Mandarin & Cantonese)9.3%
Other Indo-European7.3%
Other Asian & Pacific Island4.5%
Tagalog (incl. Filipino)3.4%
Vietnamese1.6%
Other languages1.1%
Korean0.9%
French (incl. Cajun & Haitian)0.7%
Russian, Polish, or other Slavic0.7%
Arabic0.6%
German or other West Germanic0.4%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Unaffiliated or not counted58.8%
Source · 2020 US Religion Census. The unaffiliated-or-not-counted share is everyone not claimed as an adherent by any reporting body — uncounted congregations as well as the religiously unaffiliated.
Castro Valley sits in the Pacific Coast. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 45.1 points in 2020. Between 2020 and 2024 the city moved 6.4 points toward the Republican candidate; the 2024 margin was 38.7 points.
A population of 65,001, a 36% non-Hispanic-white share, and a median household income of $142,779 describe the city.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Castro Valley, California. Akashic. https://akashic.app/city/0611964/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did Castro Valley, California vote in 2024?
In 2024, Castro Valley, California voted Democratic by 38.7 points (D+38.7), carried by the Democratic candidate. Out of 30,649 votes cast, 20,668 went Democratic and 8,805 went Republican.
How many people live in Castro Valley, California?
Castro Valley, California has a population of 65,001 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Castro Valley, California?
Median household income in Castro Valley, California is $142,779 — above the national median of $80,734. The California state median is $99,122.
What is the political history of Castro Valley, California?
Akashic tracks 5 presidential elections in Castro Valley, California from 2008 to 2024. Of those, 5 went Democratic and 0 went Republican.