California 18th Congressional District (CA) — Elections 1876–2024

California 18th Congressional District, California: Urban anchor district. In 2024, voted D+37%. Republican peak: R+49 in 1924.

Key facts

2024 presidential margin: D+37MIT Election Lab
Political archetype: Urban anchorAkashic typology
Population: 1,512,2292024 5-year
Median household income: $146,9412024 5-year
White (non-Hispanic): 32.1%2024 5-year
Black: 2.2%2024 5-year
Hispanic / Latino: 34.6%2024 5-year
Peak Democratic margin: D+49 in 2016MIT Election Lab
Peak Republican margin: R+49 in 1924MIT Election Lab

LOFGREN, ZoeCongress 119 · Democratic

−1 liberal

+1 conservative

Predecessors: ESHOO, Anna Georges (2021–2023), ESHOO, Anna Georges (2019–2021), ESHOO, Anna Georges (2017–2019), ESHOO, Anna Georges (2015–2017)

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

2024 results by constituent county

4 counties · 4 D · 0 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	+37.1%	388,316	172,305	581,974
2020	D	+45.6%	469,290	171,078	654,602
2016	D	+48.9%	382,719	119,241	539,106
2012	D	+41.2%	341,369	138,063	493,546
2008	D	+40.1%	353,450	148,069	511,880
2004	D	+27.5%	296,786	167,469	470,825
2000	D	+24.7%	257,271	150,984	430,186
1996	D	+22.8%	226,952	134,452	405,824
1992	D	+20.0%	223,207	131,946	457,186
1988	D	+3.5%	207,162	192,876	406,736
1984	R	−11.7%	171,014	217,293	394,028
1980	R	−14.4%	123,703	174,770	355,144
1976	R	−2.8%	153,990	163,077	328,620
1972	R	−8.5%	150,035	178,878	338,220
1968	D	+0.5%	125,729	124,513	267,272
1964	D	+25.7%	152,570	90,114	243,329
1960	R	−7.4%	91,366	106,067	197,995
1956	R	−19.0%	59,920	88,066	148,463
1952	R	−21.4%	50,006	77,411	128,183
1948	R	−9.7%	38,767	47,517	90,033
1944	D	+5.0%	38,757	35,080	74,261
1940	D	+3.1%	37,662	35,350	73,823
1936	D	+19.6%	34,614	23,178	58,482
1932	D	+7.6%	25,976	22,201	49,989
1928	R	−27.6%	14,919	26,399	41,632
1924	R	−49.5%	2,568	17,036	29,229
1920	R	−43.6%	6,136	17,316	25,614
1916	R	−3.1%	13,168	14,078	28,954
1912	O	+42.3%	9,319	0	22,015
1908	R	−25.2%	4,246	7,636	13,465
1904	R	−33.6%	3,581	7,723	12,324
1900	R	−13.0%	4,945	6,483	11,872
1896	R	−1.9%	5,722	5,947	11,938
1892	R	−2.1%	4,491	4,719	11,077
1888	R	−1.8%	4,631	4,809	9,926
1884	R	−5.0%	3,644	4,038	7,910
1880	R	−0.1%	3,267	3,272	6,646
1876	R	−1.4%	3,288	3,379	6,672

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

5.6%

English

5.4%

Irish

4.8%

Italian

3.5%

American

1.7%

French

1.2%

Polish

0.7%

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: 37.5 in this county, 39.1 nationally

Male

Age

Female

0.8%

85+

1.2%

2.0%

75–84

2.4%

4.1%

65–74

4.4%

6.0%

55–64

5.8%

6.6%

45–54

6.3%

7.5%

35–44

6.7%

8.2%

25–34

7.2%

4.7%

18–24

4.4%

8.3%

5–17

7.9%

2.8%

2.7%

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

Median household income

2024 inflation-adjusted dollars

$146,941

Congressional District 18 ranks near the middle of US counties.

Congressional District 18$146,941

California$99,122

United States$80,734

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

Poverty rate

All persons below federal poverty line

8.3%

Child poverty is below the national average.

Children under 189.4%

Working age (18–64)7.7%

Seniors (65+)11.9%

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

Language at home

Population aged 5 and older

45.4%

speak English only

Spanish25.2%

Asian & Pacific Islander20.2%

Other Indo-European7.9%

Other languages1.3%

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Catholic & Orthodox

32.3%

Other Christian

8.1%

Non-Christian

5.6%

Pentecostal & Holiness

1.1%

Mainline Protestant

1.0%

Baptist

1.0%

Methodist

0.5%

Source · 2020 US Religion Census. Remaining 50.4% of residents not counted as adherents by any reporting body.

CA-18 spans the heart of Santa Clara County, where a highly educated, tech-sector workforce has pushed Democratic presidential margins above 50 points — among the widest in the country.

The Democratic margin in California 18th Congressional District has been steady. It reached its modern peak at forty-nine points in 2016; the 2024 margin was thirty-seven points, still in line with the district's long pattern.

Its political identity is inseparable from its demographic profile: a 32% non-Hispanic-white share, a median household income of $146,941, and the full diversity of a major metropolitan center.

Compare two places, side by side

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Cite this page

All citations released under CC BY 4.0. Attribution: Akashic Intelligence.

Congressional District 18, California. Akashic. https://akashic.app/cd/0618/. Accessed May 20, 2026. License: CC BY 4.0.

License: CC BY 4.0

Frequently asked questions

How did Congressional District 18, California vote in 2024?

In 2024, Congressional District 18, California voted Democratic by 37.1 points (D+37), carried by the Democratic candidate. Out of 581,974 votes cast, 388,316 went Democratic and 172,305 went Republican.

What is Congressional District 18, California's political archetype?

Akashic classifies Congressional District 18, California as a "Urban anchor" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 16 times, Republican 21 times, and other 1 times.

When did Congressional District 18, California last vote Republican?

The most recent presidential election in which Congressional District 18, California voted Republican was 1984.

How many people live in Congressional District 18, California?

Congressional District 18, California has a population of 1,512,229 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.

What is the median household income in Congressional District 18, California?

Median household income in Congressional District 18, California is $146,941 — above the national median of $80,734. The California state median is $99,122.

What is the political history of Congressional District 18, California?

Akashic tracks 38 presidential elections in Congressional District 18, California from 1876 to 2024. Of those, 16 went Democratic and 21 went Republican. The district's archetype — "Urban anchor" — captures the overall trajectory of that voting record.

California 18th Congressional District has voted Democratic by double digits in every cycle this century.

Key facts

U.S. Senate

Demographics

Compare two places, side by side

Frequently asked questions