California 21st State Senate District, California: Urban anchor district. In 2024, voted D+20%. Democratic peak: D+25 in 2020.
Key facts
- 2024 presidential margin
- D+20MIT Election Lab
- Political archetype
- Urban anchorAkashic typology
- Population
- 1,019,8112024 5-year
- Median household income
- $104,0622024 5-year
- White (non-Hispanic)
- 51.2%2024 5-year
- Black
- 1.7%2024 5-year
- Hispanic / Latino
- 44.9%2024 5-year
- Peak Democratic margin
- D+25 in 2020MIT Election Lab
Constituent county margins for State Senate District 21, 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.
5 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 265,338 | 176,450 | 452,568 | ||
| D | 303,645 | 179,864 | 494,533 | ||
| D | 241,219 | 149,694 | 427,296 | ||
| D | 212,462 | 168,404 | 392,436 | ||
| D | 235,674 | 168,289 | 413,661 |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
8.9%
English
8.7%
Irish
7.8%
Italian
4.2%
American
2.8%
French
1.7%
Scottish
0.9%
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
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
$104,062
State Senate District 21 ranks near the middle of US counties.
State Senate District 21$104,062
California$99,122
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
11.8%
Child poverty is below the national average.
Children under 1814.9%
Working age (18–64)11.1%
Seniors (65+)10.2%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
61.8%
speak English only
Spanish30.7%
Asian & Pacific Islander3.8%
Other Indo-European2.7%
Other languages1.1%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 51.6% of residents not counted as adherents by any reporting body.
Anchored in the inland regions of Southern California, this district posts presidential margins exceeding 30 points in a state Democrats dominate statewide, making it a consistent outlier in California's legislative map.
The Democratic margin in California 21st State Senate District has been steady. It reached its modern peak at twenty-five points in 2020; the 2024 margin was twenty points, still in line with the district's long pattern.
Its political identity is inseparable from its demographic profile: a 51% non-Hispanic-white share, a median household income of $104,062, and the full diversity of a major metropolitan center.
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
State Senate District 21, California — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.akashic.app/sld-upper/06021/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did State Senate District 21, California vote in 2024?
In 2024, State Senate District 21, California voted Democratic by 19.6 points (D+20), carried by the Democratic candidate. Out of 452,568 votes cast, 265,338 went Democratic and 176,450 went Republican.
What is State Senate District 21, California's political archetype?
Akashic classifies State Senate District 21, California as a "Urban anchor" district based on its long-arc presidential voting pattern. 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 State Senate District 21, California?
State Senate District 21, California has a population of 1,019,811 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State Senate District 21, California?
Median household income in State Senate District 21, California is $104,062 — above the national median of $80,734. The California state median is $99,122.
What is the political history of State Senate District 21, California?
Akashic tracks 5 presidential elections in State Senate District 21, California from 2008 to 2024. Of those, 5 went Democratic and 0 went Republican. The district's archetype — "Urban anchor" — captures the overall trajectory of that voting record.