akashic
1876–2024
Assembly District 31·California

California 31st State House District votes the way the country votes.

One of California's most Republican-leaning assembly seats

1876 — 2024·38 elections
CA
Latest
R+4
in 2024
Archetype
Bellwether
since the recent cycles
Population
97,917
2024 ACS

California 31st State House District, California: Bellwether district. In 2024, voted R+4%. Democratic peak: D+57 in 1936.

Key facts

2024 presidential margin
R+4MIT Election Lab
Political archetype
BellwetherAkashic typology
Population
97,9172024 5-year
Median household income
$74,2012024 5-year
White (non-Hispanic)
35.5%2024 5-year
Black
4.4%2024 5-year
Hispanic / Latino
54.5%2024 5-year
Peak Democratic margin
D+57 in 1936MIT Election Lab
Peak Republican margin
R+31 in 1924MIT 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
−4.4%
14,60315,98031,395
D
+7.8%
18,59015,83935,144
D
+6.0%
13,61211,94727,646
D
+1.8%
12,43611,98925,010
D
+2.1%
13,16612,61826,335
R
−15.7%
9,93413,67423,832
R
−10.1%
9,15511,30121,268
R
−2.1%
9,0969,51620,070
D
+1.5%
8,9008,58421,107
R
−1.2%
8,9219,13318,286
R
−9.6%
8,31310,08918,581
R
−10.7%
6,2847,94715,542
D
+1.6%
7,2196,98514,523
R
−4.1%
7,0007,61315,093
D
+3.8%
6,2755,76913,232
D
+31.2%
8,6074,50613,127
D
+10.9%
6,9505,57912,587
D
+13.1%
6,4754,97011,472
D
+2.3%
5,2535,01010,341
D
+21.3%
4,6002,9267,865
D
+28.3%
3,9262,1836,150
D
+39.3%
4,7062,0306,814
D
+56.8%
4,1281,1125,309
D
+43.8%
3,1331,1694,482
R
−10.0%
1,6261,9923,669
R
−31.0%
4441,5063,421
R
−18.9%
9261,4082,544
D
+8.9%
1,3711,1272,746
O
+43.0%
85601,993
R
−13.1%
4576151,208
R
−24.0%
271475851
D
+0.1%
346345729
D
+16.5%
365259643
D
+42.4%
3330785
D
+6.6%
272237529
D
+12.3%
164127302
D
+29.6%
10959169
D
+47.6%
9333126

Demographics

Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
6.5%
English
4.7%
Irish
4.6%
Italian
2.4%
American
1.6%
Scottish
0.9%
French
0.8%
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: 33.5 in this county, 39.1 nationally
Male
Age
Female
0.5%
85+
0.9%
1.7%
75–84
2.1%
3.6%
65–74
4.1%
5.1%
55–64
5.2%
5.6%
45–54
5.4%
6.9%
35–44
6.6%
7.6%
25–34
7.3%
4.9%
18–24
4.7%
10.6%
5–17
10.2%
3.5%
<5
3.4%
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$74,201
Assembly District 31 ranks near the middle of US counties.
Assembly District 31$74,201
California$99,122
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
18.3%
Children face moderate poverty.
Children under 1824.9%
Working age (18–64)15.9%
Seniors (65+)14.5%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
56.3%
speak English only
Spanish33.3%
Asian & Pacific Islander5.8%
Other Indo-European3.7%
Other languages0.9%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Catholic & Orthodox
22.4%
Other Christian
10.3%
Pentecostal & Holiness
4.1%
Baptist
2.2%
Non-Christian
2.1%
Mainline Protestant
1.4%
Methodist
0.4%
Source · 2020 US Religion Census. Remaining 57.1% of residents not counted as adherents by any reporting body.

Anchored in the eastern Inland Empire and high desert, AD-31 delivered a 23-point Republican presidential margin in 2024 — an outlier in a state where most districts trend Democratic by similar or larger spreads.

The Democratic margin in California 31st State House District has rarely exceeded fifty-seven points in modern history; the Republican margin has rarely exceeded thirty-one points. 2024 delivered the district to the Republican candidate by four points.

Its demographics resemble the country more than they resemble most districts. A 36% non-Hispanic-white share, a 18% poverty rate, and a median household income of $74,201 — all within the broad national range.

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 31, California. Akashic. https://akashic.app/sld-lower/06031/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0

Frequently asked questions

How did Assembly District 31, California vote in 2024?
In 2024, Assembly District 31, California voted Republican by 4.4 points (R+4), carried by the Republican candidate. Out of 31,395 votes cast, 14,603 went Democratic and 15,980 went Republican.
What is Assembly District 31, California's political archetype?
Akashic classifies Assembly District 31, California as a "Bellwether" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 24 times, Republican 13 times, and other 1 times.
When did Assembly District 31, California last vote Democratic?
The most recent presidential election in which Assembly District 31, California voted Democratic was 2020.
How many people live in Assembly District 31, California?
Assembly District 31, California has a population of 97,917 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Assembly District 31, California?
Median household income in Assembly District 31, California is $74,201 — below the national median of $80,734. The California state median is $99,122.
What is the political history of Assembly District 31, California?
Akashic tracks 38 presidential elections in Assembly District 31, California from 1876 to 2024. Of those, 24 went Democratic and 13 went Republican. The district's archetype — "Bellwether" — captures the overall trajectory of that voting record.