California 45th Congressional District, California: Democratic loyalist district. In 2024, voted D+5%. Republican peak: R+59 in 1924.
Key facts
- 2024 presidential margin
- D+5MIT Election Lab
- Political archetype
- Democratic loyalistAkashic typology
- Population
- 393,8372024 5-year
- Median household income
- $114,4292024 5-year
- White (non-Hispanic)
- 41.9%2024 5-year
- Black
- 2.0%2024 5-year
- Hispanic / Latino
- 35.2%2024 5-year
- Peak Democratic margin
- D+37 in 1912MIT Election Lab
- Peak Republican margin
- R+59 in 1924MIT Election Lab
Constituent county margins for Congressional District 45, 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 |
|---|---|---|---|---|---|
| D | 86,835 | 79,067 | 171,423 | ||
| D | 102,711 | 81,446 | 188,122 | ||
| D | 77,520 | 60,804 | 148,187 | ||
| R | 65,544 | 69,822 | 138,814 | ||
| D | 70,059 | 69,647 | 142,791 | ||
| R | 53,891 | 77,243 | 132,902 | ||
| R | 50,160 | 65,042 | 119,890 | ||
| R | 41,927 | 53,754 | 106,792 | ||
| R | 39,597 | 51,582 | 120,246 | ||
| R | 35,003 | 71,284 | 107,543 | ||
| R | 27,144 | 77,447 | 105,692 | ||
| R | 23,216 | 64,719 | 97,126 | ||
| R | 30,325 | 50,575 | 82,991 | ||
| R | 23,832 | 56,227 | 83,960 | ||
| R | 20,694 | 40,005 | 65,216 | ||
| R | 24,876 | 29,221 | 54,151 | ||
| R | 16,721 | 23,928 | 40,752 | ||
| R | 9,219 | 16,713 | 26,124 | ||
| R | 6,470 | 12,462 | 19,097 | ||
| R | 5,672 | 7,909 | 14,157 | ||
| R | 5,839 | 6,338 | 12,250 | ||
| R | 5,610 | 5,807 | 11,549 | ||
| D | 5,609 | 3,735 | 9,495 | ||
| D | 4,336 | 3,681 | 8,461 | ||
| R | 1,479 | 4,998 | 6,539 | ||
| R | 392 | 3,156 | 4,722 | ||
| R | 564 | 1,987 | 2,803 | ||
| R | 1,074 | 1,613 | 2,931 | ||
| O | 666 | 0 | 1,791 | ||
| R | 284 | 493 | 906 | ||
| R | 148 | 401 | 657 | ||
| R | 243 | 304 | 585 | ||
| R | 244 | 271 | 534 | ||
| R | 139 | 162 | 400 | ||
| R | 29 | 39 | 72 | ||
| R | 13 | 16 | 31 | ||
| O | 8 | 8 | 17 | ||
| D | 10 | 9 | 19 |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
7.3%
English
7.1%
Irish
5.8%
American
4.4%
Italian
3.5%
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: 39.3 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
$114,429
Congressional District 45 ranks near the middle of US counties.
Congressional District 45$114,429
California$99,122
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
9.8%
Child poverty is below the national average.
Children under 1811.2%
Working age (18–64)9.2%
Seniors (65+)12.3%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
53.0%
speak English only
Spanish25.2%
Asian & Pacific Islander15.4%
Other Indo-European4.9%
Other languages1.4%
Source · ACS 5-year estimates, 2024.
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.
California 45th Congressional District sits in the Pacific Coast. Its political identity has been Democratic for as long as anyone now living can remember. 1 consecutive presidential elections in modern records have gone for the Democratic candidate, often by margins that would be considered landslide territory anywhere else.
The Democratic margin in California 45th Congressional District reached its widest at thirty-seven points in 1912. The margin in 2024 was five points — still decisive.
Its loyalty is rooted in its place. Median household income of $114,429, a 42% non-Hispanic-white share, and a population of 393,837 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 45, California — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.akashic.app/cd/0645/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did Congressional District 45, California vote in 2024?
In 2024, Congressional District 45, California voted Democratic by 4.5 points (D+5), carried by the Democratic candidate. Out of 171,423 votes cast, 86,835 went Democratic and 79,067 went Republican.
What is Congressional District 45, California's political archetype?
Akashic classifies Congressional District 45, California as a "Democratic loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 7 times, Republican 29 times, and other 2 times.
When did Congressional District 45, California last vote Republican?
The most recent presidential election in which Congressional District 45, California voted Republican was 2012.
How many people live in Congressional District 45, California?
Congressional District 45, California has a population of 393,837 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Congressional District 45, California?
Median household income in Congressional District 45, California is $114,429 — above the national median of $80,734. The California state median is $99,122.
What is the political history of Congressional District 45, California?
Akashic tracks 38 presidential elections in Congressional District 45, California from 1876 to 2024. Of those, 7 went Democratic and 29 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.