California 40th Congressional District (CA) — Elections 1876–2024

California 40th Congressional District, California: Bellwether district. In 2024, voted D+3%. Republican peak: R+60 in 1928.

Key facts

2024 presidential margin: D+3MIT Election Lab
Political archetype: BellwetherAkashic typology
Population: 1,373,5352024 5-year
Median household income: $116,1432024 5-year
White (non-Hispanic): 42.7%2024 5-year
Black: 1.6%2024 5-year
Hispanic / Latino: 34.3%2024 5-year
Peak Democratic margin: D+39 in 1912MIT Election Lab
Peak Republican margin: R+60 in 1928MIT Election Lab

KIM, YoungCongress 119 · Republican

−1 liberal

+1 conservative

Predecessors: ROYBAL-ALLARD, Lucille (2021–2023), ROYBAL-ALLARD, Lucille (2019–2021), ROYBAL-ALLARD, Lucille (2017–2019), ROYBAL-ALLARD, Lucille (2015–2017)

Source · Voteview / Lewis, Poole, Rosenthal et al. (CC-BY).

2024 results by constituent county

3 counties · 1 D · 2 R

R+60

D+60

One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.

38 presidential elections

Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
Year	Won	Margin	Democratic	Republican	Total
2024	D	+2.6%	299,780	283,893	603,063
2020	D	+9.0%	352,829	293,211	659,742
2016	D	+8.6%	264,360	219,800	518,999
2012	R	−6.2%	222,148	252,215	486,451
2008	R	−2.5%	238,186	250,827	499,870
2004	R	−20.7%	181,656	277,955	465,815
2000	R	−15.4%	169,767	234,329	420,460
1996	R	−13.7%	141,899	193,365	374,419
1992	R	−12.3%	133,026	184,660	421,186
1988	R	−36.6%	116,558	253,714	374,631
1984	R	−50.4%	89,375	274,723	367,904
1980	R	−45.2%	76,536	229,172	337,595
1976	R	−26.8%	100,565	176,703	284,431
1972	R	−41.3%	76,580	193,895	284,108
1968	R	−33.2%	64,500	136,232	215,869
1964	R	−11.8%	76,532	97,017	173,735
1960	R	−21.8%	48,582	75,757	124,644
1956	R	−34.4%	23,862	49,228	73,727
1952	R	−40.4%	14,179	33,673	48,212
1948	R	−24.4%	12,642	21,100	34,705
1944	R	−14.3%	12,464	16,665	29,307
1940	R	−11.9%	12,285	15,654	28,239
1936	D	+11.7%	12,965	10,203	23,568
1932	D	+2.5%	10,352	9,824	21,399
1928	R	−59.6%	3,309	13,273	16,732
1924	R	−58.6%	1,114	8,637	12,835
1920	R	−51.9%	1,526	5,559	7,777
1916	R	−22.0%	2,818	4,611	8,153
1912	O	+38.6%	1,917	0	4,971
1908	R	−22.1%	832	1,413	2,630
1904	R	−36.5%	450	1,161	1,950
1900	R	−9.1%	773	939	1,832
1896	R	−5.8%	746	842	1,649
1892	R	−5.4%	437	505	1,267
1888	R	−8.3%	5	6	12
1884	O	+0.0%	3	3	6
1880	O	+0.0%	1	1	3
1876	O	+0.0%	1	1	3

Congressional elections · 17 Senate races

U.S. Senate

Source · MIT Election Lab (MEDSL), Senate. CC-BY 4.0.
Year	Won	D %	R %	Total
2024	D	58.9%	41.1%	15,348,846
2022	D	61.1%	38.9%	10,843,650
2018	D	100.0%	0.0%	11,113,364
2016	D	100.0%	0.0%	12,244,170
2012	D	62.5%	37.5%	12,578,511
2010	D	52.2%	42.2%	10,000,160
2006	D	59.4%	35.0%	8,541,476
2004	D	57.7%	37.8%	12,053,295
2000	D	55.8%	36.6%	10,623,608
1998	D	53.1%	43.0%	8,311,905
1994	D	46.7%	44.8%	8,514,089
1992	D	47.9%	43.0%	10,799,703
1988	R	44.0%	52.8%	9,743,598
1986	D	49.3%	47.9%	7,398,462
1982	R	44.8%	51.5%	7,805,450
1980	D	56.5%	37.1%	8,324,012
1976	R	46.9%	50.2%	7,470,586

Demographics

Race, ethnicity, and ancestry

Click any group to see the ancestries typically reported within it.

German

7.5%

English

7.3%

Irish

6.0%

American

4.5%

Italian

3.6%

French

1.4%

Polish

1.3%

Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.

Age distribution by sex

Median age: 39.4 in this county, 39.1 nationally

Male

Age

Female

0.8%

85+

1.3%

2.1%

75–84

2.6%

4.4%

65–74

4.9%

6.5%

55–64

6.6%

45–54

6.8%

6.7%

35–44

6.6%

7.2%

25–34

7.0%

4.5%

18–24

4.4%

8.1%

5–17

7.7%

2.7%

2.5%

Source · American Community Survey 5-year estimates, 2024 release.

Median household income

2024 inflation-adjusted dollars

$116,143

Congressional District 40 ranks near the middle of US counties.

Congressional District 40$116,143

California$99,122

United States$80,734

Source · American Community Survey 5-year estimates, 2024 release.

Poverty rate

All persons below federal poverty line

9.5%

Child poverty is below the national average.

Children under 1810.7%

Working age (18–64)8.9%

Seniors (65+)12.0%

Source · American Community Survey 5-year estimates, 2024 release.

Language at home

Population aged 5 and older

53.6%

speak English only

Spanish24.4%

Asian & Pacific Islander15.7%

Other Indo-European4.9%

Other languages1.4%

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Catholic & Orthodox

30.5%

Other Christian

9.8%

Baptist

2.8%

Non-Christian

2.5%

Mainline Protestant

1.9%

Pentecostal & Holiness

1.6%

Methodist

0.4%

Source · 2020 US Religion Census. Remaining 50.5% of residents not counted as adherents by any reporting body.

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.

The Democratic margin in California 40th Congressional District has rarely exceeded thirty-nine points in modern history; the Republican margin has rarely exceeded sixty points. 2024 delivered the district to the Democratic candidate by three points.

Its demographics resemble the country more than they resemble most districts. A 43% non-Hispanic-white share, a 10% poverty rate, and a median household income of $116,143 — all within the broad national range.

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.

Congressional District 40, California. Akashic. https://akashic.app/cd/0640/. Accessed May 20, 2026. License: CC BY 4.0.

License: CC BY 4.0

Frequently asked questions

How did Congressional District 40, California vote in 2024?

In 2024, Congressional District 40, California voted Democratic by 2.6 points (D+3), carried by the Democratic candidate. Out of 603,063 votes cast, 299,780 went Democratic and 283,893 went Republican.

What is Congressional District 40, California's political archetype?

Akashic classifies Congressional District 40, California as a "Bellwether" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 5 times, Republican 29 times, and other 4 times.

When did Congressional District 40, California last vote Republican?

The most recent presidential election in which Congressional District 40, California voted Republican was 2012.

How many people live in Congressional District 40, California?

Congressional District 40, California has a population of 1,373,535 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.

What is the median household income in Congressional District 40, California?

Median household income in Congressional District 40, California is $116,143 — above the national median of $80,734. The California state median is $99,122.

What is the political history of Congressional District 40, California?

Akashic tracks 38 presidential elections in Congressional District 40, California from 1876 to 2024. Of those, 5 went Democratic and 29 went Republican. The district's archetype — "Bellwether" — captures the overall trajectory of that voting record.

California 40th Congressional District votes the way the country votes.

Key facts

U.S. Senate

Demographics

Compare two places, side by side

Frequently asked questions