California 31st State Senate District, California: Tossup district. In 2024, voted R+1%. Democratic peak: D+8 in 2020.
Key facts
- 2024 presidential margin
- R+1MIT Election Lab
- Political archetype
- TossupAkashic typology
- Population
- 950,5262024 5-year
- Median household income
- $92,9522024 5-year
- White (non-Hispanic)
- 37.5%2024 5-year
- Black
- 6.4%2024 5-year
- Hispanic / Latino
- 51.4%2024 5-year
- Peak Democratic margin
- D+8 in 2020MIT Election Lab
- Peak Republican margin
- R+1 in 2024MIT Election Lab
Constituent county margins for State Senate District 31, 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 |
|---|---|---|---|---|---|
| R | 172,989 | 177,591 | 360,140 | ||
| D | 202,379 | 171,856 | 381,727 | ||
| D | 143,376 | 127,629 | 288,070 | ||
| D | 126,286 | 121,863 | 254,267 | ||
| D | 124,833 | 118,916 | 248,461 |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
6.6%
English
6.1%
Irish
5.3%
Italian
3.0%
American
2.7%
French
1.2%
Scottish
1.1%
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: 37.0 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
$92,952
State Senate District 31 ranks near the middle of US counties.
State Senate District 31$92,952
California$99,122
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
10.6%
Child poverty is below the national average.
Children under 1813.3%
Working age (18–64)9.7%
Seniors (65+)11.3%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
57.6%
speak English only
Spanish35.0%
Asian & Pacific Islander4.4%
Other Indo-European2.1%
Other languages1.0%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 55.9% of residents not counted as adherents by any reporting body.
Covering parts of the Inland Empire and desert communities east of Los Angeles, this district recorded a 23-point Republican presidential margin in 2024 — an outlier in a state where most senate districts lean Democratic by double digits.
The district's recent history is a story of close margins. The Democratic margin reached eight points in 2020; the Republican margin reached one points in 2024. Most other elections have been decided by single-digit points.
Its demographics — a population of 950,526, a 38% non-Hispanic-white share, a median household income of $92,952 — situate the district close to national averages on several dimensions.
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
State Senate District 31, California — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.akashic.app/sld-upper/06031/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did State Senate District 31, California vote in 2024?
In 2024, State Senate District 31, California voted Republican by 1.3 points (R+1), carried by the Republican candidate. Out of 360,140 votes cast, 172,989 went Democratic and 177,591 went Republican.
What is State Senate District 31, California's political archetype?
Akashic classifies State Senate District 31, California as a "Tossup" district based on its long-arc presidential voting pattern. Across 5 elections in the dataset, the district has voted Democratic 4 times, Republican 1 times, and other 0 times.
When did State Senate District 31, California last vote Democratic?
The most recent presidential election in which State Senate District 31, California voted Democratic was 2020.
How many people live in State Senate District 31, California?
State Senate District 31, California has a population of 950,526 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 31, California?
Median household income in State Senate District 31, California is $92,952 — above the national median of $80,734. The California state median is $99,122.
What is the political history of State Senate District 31, California?
Akashic tracks 5 presidential elections in State Senate District 31, California from 2008 to 2024. Of those, 4 went Democratic and 1 went Republican. The district's archetype — "Tossup" — captures the overall trajectory of that voting record.