akashic
1876–2024
State Senate District 31·California

California 31st State Senate District delivered R+1 in 2024 — close enough to flip again next time.

One of California's most Republican-leaning upper-chamber districts

1876 — 2024·38 elections
CA
Latest
R+1
in 2024
Archetype
Tossup
since the recent cycles
Population
114,617
2024 ACS

California 31st State Senate District, California: Tossup district. In 2024, voted R+1%. Republican peak: R+57 in 1928.

Key facts

2024 presidential margin
R+1MIT Election Lab
Political archetype
TossupAkashic typology
Population
114,6172024 5-year
Median household income
$93,0742024 5-year
White (non-Hispanic)
37.6%2024 5-year
Black
6.4%2024 5-year
Hispanic / Latino
51.3%2024 5-year
Peak Democratic margin
D+29 in 1912MIT Election Lab
Peak Republican margin
R+57 in 1928MIT Election Lab
2024 results by constituent county
1 counties · 0 D · 1 R
R+60
D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
YearWonMarginDemocraticRepublicanTotal
R
−1.3%
20,89221,44243,492
D
+7.9%
24,43220,77046,111
D
+5.4%
17,28115,41034,746
D
+1.7%
15,21714,71130,664
D
+2.3%
15,03014,33729,933
R
−16.8%
10,58114,91225,784
R
−6.5%
9,36810,72620,861
R
−2.6%
7,7968,25918,109
D
+1.6%
7,6877,37419,897
R
−19.9%
6,1569,24815,554
R
−27.9%
4,7198,43113,281
R
−28.4%
3,5446,73511,250
R
−0.8%
4,4504,5219,182
R
−19.6%
3,3115,0008,620
R
−14.1%
2,8283,8577,291
D
+13.7%
3,7242,8286,557
R
−12.8%
2,3533,0455,423
R
−24.8%
1,5772,6254,223
R
−30.2%
1,2032,2603,498
R
−15.4%
1,0781,4892,676
R
−8.7%
8991,0711,986
R
−4.2%
9251,0071,960
D
+1.0%
7877711,577
R
−4.8%
5906531,300
R
−56.8%
2218141,044
R
−53.6%
61445717
R
−48.3%
129422607
R
−21.2%
211345631
O
+29.3%
1370467
R
−32.6%
64149261
R
−48.7%
31122187
R
−31.8%
52108176
R
−9.4%
7895180
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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
0.7%
85+
1.0%
2.2%
75–84
2.6%
4.3%
65–74
4.6%
5.9%
55–64
5.8%
6.1%
45–54
6.0%
6.9%
35–44
6.6%
7.0%
25–34
6.7%
4.8%
18–24
4.6%
9.3%
5–17
8.9%
3.0%
<5
2.8%
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$93,074
State Senate District 31 ranks near the middle of US counties.
State Senate District 31$93,074
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 1813.2%
Working age (18–64)9.7%
Seniors (65+)11.2%
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
Catholic & Orthodox
27.1%
Other Christian
11.1%
Pentecostal & Holiness
2.0%
Non-Christian
1.5%
Baptist
1.3%
Mainline Protestant
0.8%
Methodist
0.3%
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 twenty-nine points in 1912; the Republican margin reached fifty-seven points in 1928. Most other elections have been decided by single-digit points.

Its demographics — a population of 114,617, a 38% non-Hispanic-white share, a median household income of $93,074 — situate the district close to national averages on several dimensions.

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.
State Senate District 31, California. Akashic. https://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 43,492 votes cast, 20,892 went Democratic and 21,442 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 38 elections in the dataset, the district has voted Democratic 7 times, Republican 25 times, and other 1 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 114,617 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 $93,074 — 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 38 presidential elections in State Senate District 31, California from 1876 to 2024. Of those, 7 went Democratic and 25 went Republican. The district's archetype — "Tossup" — captures the overall trajectory of that voting record.