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California State Senate District 40

California State Senate District 40

California · Latest: 2024↓ R+2.9 vs 2020

950K residents

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Presidential margin · 2008 → 2024

Full history

  • 2008

    R+9.6

    McCain

  • 2012

    R+13.8

    Romney

  • 2016

    R+0.6

    Trump

  • 2020

    D+6.7

    Biden

  • 2024

    D+3.8

    Harris

5 cycles · 2008 → 2024 · ↓ R+2.9 vs 2020

Who lives here

Full breakdown
  • White48.3%
  • Hispanic26.1%
  • Asian16.9%

Economy & age

Population
950K
Median age
38.8
Median income
$121K
+$37K vs U.S.
College+
46%
+10.6pp vs U.S.

Faith & language

Full detail
  • Catholic22.9%
  • Evangelical9.5%

66% English only34% Non-English

Similarity Explorer

Similar state senate districts

Reads like California State Senate District 6, CA, Illinois State Senate District 43, IL, and New York State Senate District 37, NY.
8 visible matches
Historian Query

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Explore CA-SD-40's political evolution with the Historian
Race & Ancestry

Who Lives Here

A race-first Census view with ancestry expansion where source coverage is strong enough to support detail.
CA-SD-40Census ACS 2024Ancestry detail available
Census race profile
Major Census race and ethnicity groups shown as a share of total population.
Expand rows for ancestry detail
White (Non-Hispanic) 48.3%Hispanic 26.1%Asian 16.9%Multiracial 4.8%Black 2.2%Native American 1.3%Native Hawaiian 0.3%
GroupCA-SD-40StateNational
▶White (Non-Hispanic)(13)
48.3%33.8%57.4%
▶Hispanic / Latino(20)
26.1%40.2%19.3%
▶Asian(6)
16.9%15.5%6.0%
Multiracial / Other
4.8%3.5%4.0%
▶Middle Eastern / North African(11)
3.3%—0.9%
▶Black / African American(13)
2.2%5.4%12.2%
▶Native American / Alaska Native(2)
1.3%1.3%0.9%
▶Native Hawaiian / Pacific Islander(6)
0.3%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.

Click rows to expand ancestry detail. Ancestry from ACS B04006, B03001, B02020, B02016. Totals may differ from race — individuals can report multiple ancestries.

Black / African American (estimated remainder) is derived as Black population share minus reported Sub-Saharan African and West Indian ancestry. It is shown as an estimated ancestry detail, not a standalone Census ancestry category.

MENA estimated from ancestry reporting — Census does not have a separate MENA race category. Not shown in bar (overlaps with other race groups).

Who lives in California State Senate District 40? 950,203 residents as of the 2020 Census.

Demographic Comparison

Demographics

Read this geography's profile in three layers: local, state (where available), and national baseline.
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CA-SD-40 vs California vs National950K residents

46% of adults hold a bachelor's degree — 13pp above the national average. Places with similar education levels vote D+16 on average nationally.

Population & electorate

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

Total population
Local vs state vs U.S.
950K
local
950KState 39.3MNational 334.9M
Share of U.S. population
Local vs state vs U.S.
0.28%
local
0.28%National 100%
Voting-age population
Local vs state vs U.S.
77.8%
local
77.8%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.
$120,763
local
$120,763State $102,676National $83,960
Poverty rate
Local vs state vs U.S.
8.6%
local
8.6%State 12.0%National 12.5%
College degree
Local vs state vs U.S.
46.2%
local
46.2%State 36.6%National 35.6%
Homeownership
Local vs state vs U.S.
65.3%
local
65.3%State 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.
38.8 yrs
local
38.8 yrsState 37.9 yrsNational 39.1 yrs
Age 18–29
Local vs state vs U.S.
14.9%
local
14.9%State 16.2%National 15.7%
Age 65+
Local vs state vs U.S.
16.4%
local
16.4%State 15.7%National 17.0%
Foreign born
Local vs state vs U.S.
23.8%
local
23.8%State 27.0%National 14.1%
Non-English at home
Local vs state vs U.S.
33.9%
local
33.9%State 44.4%National 22.2%
English only
Local vs state vs U.S.
66.1%
local
66.1%State 55.6%National 77.8%
Voter Turnout

Turnout in CA-SD-40

Turnout % = votes cast ÷ voting-age population (VAP). Source: PL 94-171 2020 Census.
2024 Turnout
61.3%
vs Previous
-4.0pp
Voting-Age Pop
739,139
History
2008–2024
Contained geographies

Counties in CA-SD-40

Counties that overlap CA-SD-40.

Counties

(1)
San Diego100%

Other California State Senate Districts

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