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Castro Valley CDP, California

Castro Valley CDP, California

Census Designated Place · Latest: 2024↓ R+6.2 vs 2020

Safe Democratic — shifted 6.2pp toward Republicans in 2024 — 66K residents

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Race & ancestry
Group%
White (Non-Hispanic)
36.7%
Hispanic / Latino
19.3%
Black / African American
6.4%
Asian
30.8%
Native American / Alaska Native
0.9%
Native Hawaiian / Pacific Islander
0.5%
Multiracial / Other
5.5%
View full demographics →
Key demographics
MetricValue
Median household income—
Bachelor's or higher—
English only at home—
Other language at home—
Foreign-born—
View full demographics →
Presidential results
YearResult
2024Harris+38.7
2020Biden+44.9
2016Clinton+44.2
2012Obama+40.0
2008Obama+38.7
View full election history →

Castro Valley CDP, California is a city that has a population of 66,441. In the 2024 presidential election, it voted Democratic with a margin of D+38.7. Akashic Edge tracks 5 presidential elections here, dating back to 2008.

Castro Valley CDP Presidential Election Results, 2008–2024
YearDem %Rep %MarginSwing
202467.4%28.7%D+38.7R+6.2
202071.2%26.3%D+44.9D+0.7
201668.9%24.7%D+44.2D+4.2
201270.0%30.0%D+40.0D+1.3
200869.3%30.6%D+38.7—
Political Identity

What defines Castro Valley CDP?

It has a majority-minority electorate where racial demographics are the primary driver of partisan lean.

Similarity Explorer

Similar cities

Nearest neighbors matched on the same place-page feature set used across the dossier system.
8 visible matches
Containing Geography

Located In

Castro Valley CDP sits inside these higher-level geographies.
Historian Query

Ask the Historian

Explore Castro Valley CDP's political evolution with the Historian
Automated Readout

Key Insights

High-confidence patterns distilled from this geography's election history.
  • Has voted Democratic in the last 5 presidential elections
  • Latest election (2024) was a Democratic landslide with a 38.7% margin
  • Turnout decreased by 8.3 percentage points since the previous presidential election
Race & Ancestry

Who Lives Here

A race-first Census view with ancestry expansion where source coverage is strong enough to support detail.
Castro Valley CDPCensus ACS 2024
Census race profile
Major Census race and ethnicity groups shown as a share of total population.
Expand rows for ancestry detail
White (Non-Hispanic) 36.7%Asian 30.8%Hispanic 19.3%Black 6.4%Multiracial 5.5%Native American 0.9%Native Hawaiian 0.5%
GroupCastro Valley CDPNational
White (Non-Hispanic)
36.7%57.4%
Asian
30.8%6.0%
Hispanic / Latino
19.3%19.3%
Black / African American
6.4%12.2%
Multiracial / Other
5.5%4.0%
Native American / Alaska Native
0.9%0.9%
Native Hawaiian / Pacific Islander
0.5%0.2%
Method notes

Census treats race and Hispanic/Latino origin as separate questions. Race categories other than Hispanic reflect total populations (small Hispanic overlap in Black, Asian, AIAN, NHPI). “Multiracial / Other” is derived as a non-overlapping remainder.

Detailed ancestry data unavailable for this geography.

Who lives in Castro Valley CDP? 66,441 residents as of the 2020 Census.

Demographic Comparison

Demographics

Read this geography's profile in three layers: local, state (where available), and national baseline.
Castro Valley CDP vs National66K residents
Population & electorate

Scale, voting-age share, and this geography's footprint inside the national electorate.

Total population
Local vs state vs U.S.
66K
local
66KNational 334.9M
Share of U.S. population
Local vs state vs U.S.
0.02%
local
0.02%National 100%
Voting-age population
Local vs state vs U.S.
78.5%
local
78.5%National 75.7%
Economic profile

Income, attainment, and ownership indicators that often shape coalition structure and turnout behavior.

Median household income
Local vs state vs U.S.
N/A
local
N/ANational $83,960
Poverty rate
Local vs state vs U.S.
N/A
local
N/ANational 12.5%
College degree
Local vs state vs U.S.
N/A
local
N/ANational 35.6%
Homeownership
Local vs state vs U.S.
N/A
local
N/ANational 65.2%
Community profile

Age structure, language use, and nativity signals that explain how this geography differs from state and nation.

Median age
Local vs state vs U.S.
N/A
local
N/ANational 39.1 yrs
Age 18–29
Local vs state vs U.S.
N/A
local
N/ANational 15.7%
Age 65+
Local vs state vs U.S.
N/A
local
N/ANational 17.0%
Foreign born
Local vs state vs U.S.
N/A
local
N/ANational 14.1%
Non-English at home
Local vs state vs U.S.
N/A
local
N/ANational 22.2%
English only
Local vs state vs U.S.
N/A
local
N/ANational 77.8%
Voter Turnout

Turnout in Castro Valley CDP

Estimated using 2020 Census voting-age population.
2024 Turnout
58.8%
vs Previous
-8.3pp
Voting-Age Pop
52,125
History
2008–2024
Competitiveness

How competitive is Castro Valley CDP?

Safe DAvg margin: D+42.6 (last 3 elections)
2008
D+38.7
2012
D+40.0
2016
D+44.2
2020
D+44.9
2024
D+38.7
Elasticity
6.2pp
margin range
Party Flips
0
last 30 years
5-Elec Avg
D+41.3
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