congressional districtCalifornia 40th Congressional District
presidential margin
2004–2024 · Democratic minus Republican
2004R+32.7
2008R+14.5
2012R+21.4
2016R+13.7
2020R+7.7
2024R+12.2
net swing · 2004→2024D+20.5R+32.7 → R+12.2
vs. U.S. · 2024R+10.7R+12.2 vs R+1.5
presidential returns
2024 turnout 69.1% of 550,421 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
161,317
207,749
11,353
380,419
550,421
69.1%
2020
179,452
209,880
7,655
396,987
539,179†
73.6%
2016
121,963
163,250
16,175
301,388
508,775†
59.2%
2012
105,432
164,775
6,752
276,959
474,091†
58.4%
2008
112,915
151,283
822
265,020
449,483†
59.0%
2004
83,372
165,753
2,479
251,604
424,875†
59.2%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
District by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupCA-40CaliforniaUnited States
German11.1%6.8%12.5%
English10.6%6.3%9.5%
Irish8.8%5.9%9.4%
American6.3%2.8%5.3%
Italian5.2%3.4%4.8%
French2.1%1.3%1.6%
Scottish1.9%0.9%1.3%
Polish1.9%0.9%2.2%
Mexican26.8%32.3%11.3%
Salvadoran1.0%2.0%0.7%
Guatemalan0.7%1.3%0.5%
Spanish0.4%0.3%—
Puerto Rican0.3%0.6%1.8%
Spaniard0.3%0.3%—
Colombian0.3%0.3%0.4%
Cuban0.3%—0.7%
Vietnamese3.4%1.7%0.6%
Chinese1.7%3.9%1.3%
Korean1.6%1.2%0.4%
Filipino1.5%3.3%0.9%
Asian Indian1.0%2.3%1.4%
Japanese0.5%0.6%0.2%
Taiwanese0.2%0.3%—
Pakistani0.2%——
African American†3.5%4.4%9.9%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
CA-40
California
United States
Median age
41.1
37.9
39.1
Age 18–24
8.9%
9.1%
9.2%
Age 65 and older
16.1%
15.6%
17.2%
Household economy
Measure
CA-40
California
United States
Median household income
$114,813
$99,122
$84,427
Poverty rate
8.2%
12.0%
12.5%
Bachelor's degree or higher (25+)
41.3%
36.6%
35.6%
Languages at home
Measure
CA-40
California
United States
Speaks a non-English language at home
45.8%
44.4%
22.3%
Spanish
25.9%
28.4%
13.6%
Other Indo-European
3.3%
3.4%
2.0%
Chinese (incl. Mandarin & Cantonese)
2.9%
3.5%
1.1%
Vietnamese
5.5%
1.5%
0.5%
Religious landscape
Measure
CA-40
California
United States
Catholic
—
26.2%
18.6%
Evangelical Protestant
—
9.0%
16.5%
Unclaimed / not counted
—
55.2%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
California 40th Congressional District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
−32.7%
2008
−14.5%
2012
−21.4%
2016
−13.7%
2020
−7.7%
2024
−12.2%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Federal officeholders only. State and local officeholders are planned for the next data pass.
Congressional elections · 25 House races · 17 Senate races
U.S. House
Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.
Source · MIT Election Lab (MEDSL), House. CC-BY 4.0.
Year
District
Won
Democratic
Republican
Total
2024
40
R
44.7%171,637
55.3%211,998
383,635
2022
40
R
43.2%122,722
56.8%161,589
284,311
2020
40
D
72.7%135,572
27.3%50,809
186,381
2018
40
D
77.3%93,938
0.0%0
121,449
2016
40
D
71.4%106,554
0.0%0
149,297
2014
40
D
100.0%49,379
0.0%0
49,379
2012
40
D
100.0%125,553
0.0%0
125,553
2010
40
R
33.2%59,400
66.8%119,455
178,855
2008
40
R
37.5%86,772
62.5%144,923
231,695
2006
40
R
30.7%46,418
66.8%100,995
151,289
2004
40
R
32.1%69,684
67.9%147,617
217,301
2002
40
R
29.5%40,265
67.6%92,422
136,642
2000
40
R
0.0%0
79.9%151,069
189,022
1998
40
R
31.9%47,897
64.9%97,406
150,125
1996
40
R
29.0%44,102
64.9%98,821
152,261
1994
40
R
29.3%48,003
70.7%115,728
163,731
1992
40
R
31.1%63,881
63.1%129,563
205,283
1990
40
R
32.4%68,087
67.6%142,299
210,386
1988
40
R
29.9%80,782
67.0%181,269
270,376
1986
40
R
37.7%75,664
59.8%119,829
200,518
1984
40
R
34.0%86,748
64.4%164,257
254,974
1982
40
R
26.1%52,546
71.5%144,228
201,600
1980
40
R
21.8%66,512
70.2%213,999
304,997
1978
40
R
34.1%76,358
65.9%147,882
224,240
1976
40
R
40.7%102,132
59.3%148,512
250,644
U.S. Senate
The statewide Senate race, counted in this district — aggregated from the precinct-level returns that fall inside its boundaries (not a statewide figure).
Votes · MIT Election Lab (MEDSL) precinct returns (CC BY 4.0); aggregated to the district over VEST precinct geometry (CC BY-NC 4.0).
Year
Won
Democratic
Republican
Total
2024
R
41.7%154,836
58.3%216,476
371,312
2022
D
61.1%6,621,621
38.9%4,222,029
10,843,650
2018
D
100.0%11,113,364
0.0%0
11,113,364
2016
D
100.0%12,244,170
0.0%0
12,244,170
2012
D
62.5%7,864,624
37.5%4,713,887
12,578,511
2010
D
52.2%5,218,441
42.2%4,217,366
10,000,093
2006
D
59.4%5,076,289
35.0%2,990,822
8,541,150
2004
D
57.7%6,955,728
37.8%4,555,922
12,053,242
2000
D
55.8%5,932,522
36.6%3,886,853
10,623,608
1998
D
53.1%4,410,056
43.0%3,575,078
8,311,905
1994
D
46.7%3,979,152
44.8%3,817,025
8,513,916
1992
D
47.9%5,173,467
43.0%4,644,182
10,799,436
1988
R
44.0%4,287,253
52.8%5,143,409
9,743,547
1986
D
49.3%3,646,672
47.9%3,541,804
7,398,462
1982
R
44.8%3,494,968
51.5%4,022,565
7,805,450
1980
D
56.5%4,704,098
37.1%3,091,671
8,324,012
1976
R
46.9%3,502,862
50.2%3,748,973
7,470,586
2024 U.S. Senate — every candidate counted in this district
Steve Garvey · Republican58.3%216,476
Adam B Schiff · Democrat41.7%154,836
CA-40 covers dense urban communities in Los Angeles County where Democratic presidential candidates have routinely posted margins above 30 points, reflecting a heavily Latino and working-class electorate with consistently high partisan loyalty.
Across the recorded series it reached a Republican high of 32.7 points in 2004. Between 2020 and 2024 the district moved 4.5 points toward the Republican candidate; the 2024 margin was 12.2 points.
A population of 757,523, a 47% non-Hispanic-white share, and a median household income of $114,813 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 47 and Congressional District 22.
Akashic
Political twins — districts
The congressional districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
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 →
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California 40th Congressional District. Akashic. https://akashic.app/cd/0640/. Accessed May 20, 2026. License: CC BY 4.0.
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How did California 40th Congressional District vote in 2024?
In 2024, California 40th Congressional District voted Republican by 12.2 points (R+12.2), carried by the Republican candidate. Out of 380,419 votes cast, 161,317 went Democratic and 207,749 went Republican.
How many people live in California 40th Congressional District?
California 40th Congressional District has a population of 757,523 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in California 40th Congressional District?
Median household income in California 40th Congressional District is $114,813 — above the national median of $80,734. The California state median is $99,122.
What is the political history of California 40th Congressional District?
Akashic tracks 6 presidential elections in California 40th Congressional District from 2004 to 2024. Of those, 0 went Democratic and 6 went Republican.
