California 18th Congressional District: New American district. In 2024, voted D+30%. Democratic peak: D+49 in 2016.
Key facts
- 2024 presidential margin
- D+30MIT Election Lab
- Political typology
- New AmericanAkashic 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
DW-NOMINATE
Member ideology
D
LOFGREN, Zoe
LOFGREN scores -0.40 on the first NOMINATE dimension (−1 most liberal, +1 most 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 presidential election
Congressional District 18
HarrisD+30
How it voted
Share of the 2024 vote
| Kamala Harris ✓Democratic | 63.2% | 149,272 |
|---|---|---|
| Donald TrumpRepublican | 33.7% | 79,557 |
| OtherAll other candidates | 3.1% | 7,430 |
D+60R+60
4 counties, each filled by 2024 D-vs-R margin. Hover any county for its result.
presidential history
Presidential margin, 2008–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 2008 | +43.4% |
| 2012 | +47.3% |
| 2016 | +48.8% |
| 2020 | +44.0% |
| 2024 | +29.5% |
DemocraticRepublican
5 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 149,272 | 79,557 | 236,259 | ||
| D | 190,152 | 72,151 | 268,110 | ||
| D | 149,698 | 47,557 | 209,440 | ||
| D | 134,241 | 48,055 | 182,296 | ||
| D | 127,759 | 50,114 | 178,748 |
Congressional elections · 17 Senate races
U.S. Senate
| 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
2024 ACS
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.
2024 ACS
Age distribution by sex
Median age: 37.5 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
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.
2024 ACS
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.
2024 ACS
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.
2020 religion census
Religious adherents
Adherents per capita by tradition
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.
Across the recorded series it reached a Democratic high of forty-nine points in 2016. Between 2020 and 2024 the district moved fifteen points toward the Republican candidate; the 2024 margin was thirty points.
A population of 1,512,229, a 32% non-Hispanic-white share, and a median household income of $146,941 describe the district.
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 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 29.5 points (D+30), carried by the Democratic candidate. Out of 236,259 votes cast, 149,272 went Democratic and 79,557 went Republican.
What is Congressional District 18, California's political typology?
Akashic places Congressional District 18, California in the "New American" typology. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 5 elections in the dataset, the district has voted Democratic 5 times, Republican 0 times, and other 0 times.
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 5 presidential elections in Congressional District 18, California from 2008 to 2024. Of those, 5 went Democratic and 0 went Republican. The district's typology — "New American" — captures where that record, its demographics, and its recent swing place it among American communities.