California 20th Congressional District, California: Republican loyalist district. In 2024, voted R+19%. Democratic peak: D+46 in 1912.
Key facts
- 2024 presidential margin
- R+19MIT Election Lab
- Political archetype
- Republican loyalistAkashic typology
- Population
- 1,088,2662024 5-year
- Median household income
- $71,0462024 5-year
- White (non-Hispanic)
- 40.6%2024 5-year
- Black
- 4.0%2024 5-year
- Hispanic / Latino
- 59.4%2024 5-year
- Peak Democratic margin
- D+46 in 1912MIT Election Lab
- Peak Republican margin
- R+31 in 1924MIT Election Lab
Constituent county margins for Congressional District 20, CAOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 129,896 | 192,268 | 330,308 | ||
| R | 161,145 | 186,686 | 356,058 | ||
| R | 118,075 | 144,224 | 281,634 | ||
| R | 106,317 | 141,337 | 254,321 | ||
| R | 111,491 | 149,809 | 267,253 | ||
| R | 82,530 | 159,066 | 244,021 | ||
| R | 80,204 | 127,815 | 214,854 | ||
| R | 77,756 | 107,237 | 202,940 | ||
| R | 74,837 | 94,230 | 211,309 | ||
| R | 70,865 | 106,085 | 179,126 | ||
| R | 64,295 | 113,262 | 179,306 | ||
| R | 54,043 | 88,814 | 153,204 | ||
| R | 61,838 | 70,856 | 135,437 | ||
| R | 53,148 | 83,893 | 143,075 | ||
| R | 57,467 | 64,740 | 135,534 | ||
| D | 79,324 | 52,092 | 131,550 | ||
| R | 61,814 | 63,677 | 126,055 | ||
| R | 54,834 | 56,058 | 111,255 | ||
| R | 47,012 | 57,202 | 105,011 | ||
| D | 42,635 | 33,507 | 78,279 | ||
| D | 34,815 | 28,254 | 63,450 | ||
| D | 42,798 | 26,875 | 70,407 | ||
| D | 36,786 | 13,369 | 50,839 | ||
| D | 28,840 | 12,148 | 43,029 | ||
| R | 12,856 | 21,206 | 34,433 | ||
| R | 5,250 | 14,797 | 30,885 | ||
| R | 8,878 | 13,404 | 24,101 | ||
| D | 13,686 | 10,359 | 25,985 | ||
| O | 8,123 | 0 | 17,483 | ||
| R | 3,838 | 4,434 | 9,264 | ||
| R | 2,742 | 3,922 | 7,651 | ||
| D | 3,468 | 2,975 | 6,738 | ||
| D | 3,666 | 2,384 | 6,191 | ||
| D | 3,110 | 2,046 | 7,062 | ||
| D | 3,022 | 2,513 | 5,796 | ||
| D | 1,931 | 1,452 | 3,556 | ||
| D | 1,497 | 1,027 | 2,632 | ||
| D | 1,639 | 1,101 | 2,740 |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
5.5%
English
5.2%
Irish
4.5%
American
2.7%
Italian
1.8%
Scottish
0.9%
French
0.8%
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: 32.6 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.
Median household income
2024 inflation-adjusted dollars
$71,046
Congressional District 20 ranks near the middle of US counties.
Congressional District 20$71,046
California$99,122
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
18.6%
Children face higher poverty than working-age adults.
Children under 1825.0%
Working age (18–64)15.9%
Seniors (65+)15.7%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
53.2%
speak English only
Spanish41.1%
Asian & Pacific Islander2.9%
Other Indo-European2.0%
Other languages0.7%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 52.4% of residents not counted as adherents by any reporting body.
California 20th Congressional District sits in the Pacific Coast. Its political identity has been Republican for as long as anyone now living can remember. 1 consecutive presidential elections in modern records have gone for the Republican candidate, often by margins that would be considered landslide territory anywhere else.
The Republican margin in California 20th Congressional District reached its widest at thirty-one points in 2004. The margin in 2024 was nineteen points, in line with the district's deep historical pattern.
Its loyalty is rooted in its place. Median household income of $71,046, a 41% non-Hispanic-white share, and a population of 1,088,266 together describe a district whose political habits are deeply settled.
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Congressional District 20, California — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.akashic.app/cd/0620/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did Congressional District 20, California vote in 2024?
In 2024, Congressional District 20, California voted Republican by 18.9 points (R+19), carried by the Republican candidate. Out of 330,308 votes cast, 129,896 went Democratic and 192,268 went Republican.
What is Congressional District 20, California's political archetype?
Akashic classifies Congressional District 20, California as a "Republican loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 14 times, Republican 23 times, and other 1 times.
When did Congressional District 20, California last vote Democratic?
The most recent presidential election in which Congressional District 20, California voted Democratic was 1964.
How many people live in Congressional District 20, California?
Congressional District 20, California has a population of 1,088,266 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Congressional District 20, California?
Median household income in Congressional District 20, California is $71,046 — below the national median of $80,734. The California state median is $99,122.
What is the political history of Congressional District 20, California?
Akashic tracks 38 presidential elections in Congressional District 20, California from 1876 to 2024. Of those, 14 went Democratic and 23 went Republican. The district's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.