California 12th State House District, California: Realigner district. In 2024, voted D+59%. Democratic peak: D+62 in 2020.
Key facts
- 2024 presidential margin
- D+59MIT Election Lab
- Political archetype
- RealignerAkashic typology
- Population
- 377,6102024 5-year
- Median household income
- $135,0162024 5-year
- White (non-Hispanic)
- 65.8%2024 5-year
- Black
- 2.0%2024 5-year
- Hispanic / Latino
- 22.8%2024 5-year
- Peak Democratic margin
- D+62 in 2020MIT Election Lab
- Peak Republican margin
- R+47 in 1924MIT Election Lab
Constituent county margins for Assembly District 12, 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 | 160,451 | 39,699 | 206,155 | ||
| D | 177,604 | 39,862 | 222,013 | ||
| D | 148,279 | 34,452 | 198,229 | ||
| D | 137,867 | 44,393 | 188,222 | ||
| D | 150,977 | 41,982 | 197,141 | ||
| D | 135,639 | 51,201 | 189,760 | ||
| D | 108,066 | 50,542 | 171,748 | ||
| D | 92,254 | 45,924 | 160,858 | ||
| D | 101,892 | 42,225 | 179,469 | ||
| D | 91,904 | 63,560 | 157,775 | ||
| R | 75,118 | 75,743 | 152,963 | ||
| R | 50,477 | 64,655 | 139,581 | ||
| R | 56,009 | 65,894 | 127,847 | ||
| R | 58,203 | 68,353 | 129,887 | ||
| R | 44,562 | 50,816 | 102,007 | ||
| D | 57,401 | 35,508 | 93,155 | ||
| R | 35,077 | 46,164 | 81,458 | ||
| R | 22,386 | 42,094 | 64,652 | ||
| R | 18,440 | 37,982 | 57,034 | ||
| R | 16,493 | 24,192 | 42,717 | ||
| D | 18,450 | 17,327 | 35,880 | ||
| R | 15,121 | 15,123 | 30,626 | ||
| D | 16,412 | 8,970 | 25,653 | ||
| D | 13,633 | 8,740 | 23,327 | ||
| R | 7,784 | 11,042 | 19,014 | ||
| R | 1,092 | 8,132 | 15,000 | ||
| R | 2,692 | 7,935 | 11,639 | ||
| R | 5,855 | 6,729 | 13,414 | ||
| O | 4,452 | 0 | 9,902 | ||
| R | 1,764 | 4,071 | 6,331 | ||
| R | 1,467 | 3,499 | 5,219 | ||
| R | 1,772 | 2,762 | 4,644 | ||
| R | 1,761 | 2,448 | 4,286 | ||
| R | 1,800 | 1,930 | 3,927 | ||
| R | 1,639 | 1,748 | 3,503 | ||
| R | 1,453 | 1,602 | 3,107 | ||
| R | 1,209 | 1,326 | 2,588 | ||
| D | 1,336 | 1,251 | 2,588 |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
English
13.3%
German
13.0%
Irish
12.9%
Italian
7.3%
French
2.9%
Scottish
2.5%
Polish
2.0%
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: 46.0 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
$135,016
Assembly District 12 ranks near the middle of US counties.
Assembly District 12$135,016
California$99,122
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
8.5%
Child poverty is below the national average.
Children under 189.7%
Working age (18–64)8.2%
Seniors (65+)8.6%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
75.1%
speak English only
Spanish16.1%
Other Indo-European4.9%
Asian & Pacific Islander3.0%
Other languages0.7%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 63.2% of residents not counted as adherents by any reporting body.
Assembly District 12 recorded a D+55.5 presidential margin in 2024, placing it among the most heavily one-sided state house seats in California. Its composition likely reflects dense urban precincts where partisan lean is reinforced by high population concentration.
The unraveling was not abrupt. The Democratic margin in California 12th State House District peaked at sixty-two points in 2020; it narrowed steadily over the late twentieth century. The 1988 election delivered the district to the Republican party for the first time in many years, by a margin of eighteen points. By 2024, the margin had widened further.
The economic and demographic context is severe. The median household income of $135,016 is among the lowest at this geographic scale; 9% of residents live below the federal poverty line.
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.
Assembly District 12, California. Akashic. https://akashic.app/sld-lower/06012/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did Assembly District 12, California vote in 2024?
In 2024, Assembly District 12, California voted Democratic by 58.6 points (D+59), carried by the Democratic candidate. Out of 206,155 votes cast, 160,451 went Democratic and 39,699 went Republican.
What is Assembly District 12, California's political archetype?
Akashic classifies Assembly District 12, California as a "Realigner" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 15 times, Republican 22 times, and other 1 times.
When did Assembly District 12, California last vote Republican?
The most recent presidential election in which Assembly District 12, California voted Republican was 1984.
How many people live in Assembly District 12, California?
Assembly District 12, California has a population of 377,610 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Assembly District 12, California?
Median household income in Assembly District 12, California is $135,016 — above the national median of $80,734. The California state median is $99,122.
What is the political history of Assembly District 12, California?
Akashic tracks 38 presidential elections in Assembly District 12, California from 1876 to 2024. Of those, 15 went Democratic and 22 went Republican. The district's archetype — "Realigner" — captures the overall trajectory of that voting record.