How did CA-SD-04, California vote in the 2024 presidential election?

CA-SD-04, California voted Republican in 2024 with a margin of R+12.7. Kamala D Harris received 195,075 votes and Donald Trump received 253,598 out of 460,940 total votes cast, a 7.4-point shift toward Republicans from 2020.

What is CA-SD-04, California's political history?

CA-SD-04, California has 5 presidential elections on record, spanning 2008 to 2024. It has voted Republican in every presidential election since 2008. The largest single-election swing was 7.4 points in 2024.

What are the demographics of CA-SD-04, California?

CA-SD-04, California has a population of 1,036,028 according to the 2020 Census. The racial composition is 48.9% non-Hispanic white, 33.3% Hispanic, 1.9% Black.

Which places are most similar to CA-SD-04, California?

Based on demographic and electoral similarity analysis, the three most similar state senate districts to CA-SD-04, California are Illinois State Senate District 49, Virginia Senate of Virginia District 29, Virginia Senate of Virginia District 31. Similarity is computed using a vector embedding of demographic, economic, and electoral characteristics.

California State Senate District 4

California · Latest: 2024↓ R+7.4 vs 2020

Leans Republican — shifted 7.4pp toward Republicans in 2024 — 1.0M residents

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Similarity Explorer

Similar state senate districts

Nearest neighbors matched on the same place-page feature set used across the dossier system.

8 visible matches

Illinois State Senate District 49IL

Suburban Republican 2

D+9.2

Similarity score90%

Virginia Senate of Virginia District 29VA

Diverse urban democratic

D+16.9

Similarity score89%

Virginia Senate of Virginia District 31VA

Suburban Republican 2

D+8.6

Similarity score88%

Virginia Senate of Virginia District 1VA

Suburban Republican 2

R+28.1

Similarity score87%

Washington State Senate District 5WA

Suburban Republican 2

D+23.6

Similarity score86%

Missouri State Senate District 11MO

Suburban Republican 2

R+11.7

Similarity score86%

Florida State Senate District 35FL

Diverse urban democratic

D+9.2

Similarity score85%

Iowa State Senate District 15IA

Urban Competitive 2

D+16.8

Similarity score85%

Historian Query

Ask the Historian

Explore CA-SD-04's political evolution with the Historian

“How has California State Senate District 4 voted in presidential elections?”

Race & Ancestry

Who Lives Here

A race-first Census view with ancestry expansion where source coverage is strong enough to support detail.

CA-SD-04Census 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) 48.9%Hispanic 33.3%Multiracial 8.8%Asian 4.7%Black 1.9%Native American 1.9%Native Hawaiian 0.5%

Group	CA-SD-04	State	National
White (Non-Hispanic)	48.9%	33.8%	57.4%
Hispanic / Latino	33.3%	40.2%	19.3%
Multiracial / Other	8.8%	3.5%	4.0%
Asian	4.7%	15.5%	6.0%
Black / African American	1.9%	5.4%	12.2%
Native American / Alaska Native	1.9%	1.3%	0.9%
Native Hawaiian / Pacific Islander	0.5%	0.4%	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 California State Senate District 4? 1,036,028 residents as of the 2020 Census.

Demographic Comparison

Demographics

Read this geography's profile in three layers: local, state (where available), and national baseline.

CA-SD-04 vs California vs National1.0M residents

Population & electorate

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

Total population

Local vs state vs U.S.

1.0M

local

1.0MState 39.3MNational 334.9M

Share of U.S. population

Local vs state vs U.S.

0.31%

local

0.31%National 100%

Voting-age population

Local vs state vs U.S.

76.8%

local

76.8%State 75.8%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/AState $102,676National $83,960

Poverty rate

Local vs state vs U.S.

N/A

local

N/AState 12.0%National 12.5%

College degree

Local vs state vs U.S.

N/A

local

N/AState 36.6%National 35.6%

Homeownership

Local vs state vs U.S.

N/A

local

N/AState 55.9%National 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/AState 37.9 yrsNational 39.1 yrs

Age 18–29

Local vs state vs U.S.

N/A

local

N/AState 16.2%National 15.7%

Age 65+

Local vs state vs U.S.

N/A

local

N/AState 15.7%National 17.0%

Foreign born

Local vs state vs U.S.

N/A

local

N/AState 27.0%National 14.1%

Non-English at home

Local vs state vs U.S.

N/A

local

N/AState 44.4%National 22.2%

English only

Local vs state vs U.S.

N/A

local

N/AState 55.6%National 77.8%

Voter Turnout

Turnout in CA-SD-04

Estimated using 2020 Census voting-age population.

2024 Turnout

57.9%

vs Previous

-3.7pp

Voting-Age Pop

796,031

History

2008–2024

Competitiveness

How competitive is CA-SD-04?

Lean RAvg margin: R+8.5 (last 3 elections)

2008

R+4.3

2012

R+7.8

2016

R+7.6

2020

R+5.3

2024

R+12.7

Elasticity

8.4pp

margin range

Party Flips

last 30 years

5-Elec Avg

R+7.5

Other California State Senate Districts

39 total

Name	Margin ↓
CA-SD-07	D+71.7
CA-SD-11	D+62.3
CA-SD-28	D+59.7
CA-SD-26	D+54.1
CA-SD-13	D+52.3
CA-SD-35	D+45.8
CA-SD-02	D+43.3
CA-SD-09	D+38.3
CA-SD-10	D+37.3
CA-SD-24	D+36.6
CA-SD-33	D+36.2
CA-SD-15	D+35.0
CA-SD-08	D+32.5
CA-SD-17	D+31.9
CA-SD-20	D+28.1
CA-SD-39	D+27.5
CA-SD-03	D+27.0
CA-SD-25	D+24.3
CA-SD-21	D+22.7
CA-SD-27	D+21.9
CA-SD-30	D+17.3
CA-SD-34	D+16.3
CA-SD-22	D+14.1
CA-SD-18	D+13.1
CA-SD-38	D+12.9

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