Skip to main content
California Assembly District 31

California Assembly District 31

California · Latest: 2024↓ R+4.5 vs 2020

Leans Democratic — shifted 4.5pp toward Republicans in 2024 — 495K residents

Ask HistorianOpen in ExploreCompareShare image

California Assembly District 31 is a state house district that has a population of 495,465. In the 2024 presidential election, it voted Democratic with a margin of D+13.1. Akashic Edge tracks 5 presidential elections here, dating back to 2008.

California Assembly District 31 Presidential Election Results, 2008–2024
YearDem %Rep %MarginSwing
202455.2%42.1%D+13.1R+4.5
2020*57.8%40.2%D+17.6R+15.2
2016*63.7%31.0%D+32.8D+1.1
2012*65.9%34.1%D+31.7D+4.1
2008*63.4%35.8%D+27.6—

* Pre-2022 results projected onto current district boundaries. Actual boundaries at the time of the election may have differed.

Political Identity

What defines CA-HD-31?

It has a majority-minority electorate where racial demographics are the primary driver of partisan lean.

Similarity Explorer

Similar state house districts

Nearest neighbors matched on the same place-page feature set used across the dossier system.
8 visible matches
Historian Query

Ask the Historian

Explore CA-HD-31's political evolution with the Historian
Automated Readout

Key Insights

High-confidence patterns distilled from this geography's election history.
  • Has voted Democratic in the last 5 presidential elections
  • Margins have been narrowing — from 32.8pp to 13.1pp over the last 3 presidential elections
  • Turnout decreased by 57.4 percentage points since the previous presidential election
Race & Ancestry

Who Lives Here

A race-first Census view with ancestry expansion where source coverage is strong enough to support detail.
CA-HD-31Census ACS 2024
Census race profile
Major Census race and ethnicity groups shown as a share of total population.
Expand rows for ancestry detail
Hispanic 64.2%White (Non-Hispanic) 15.3%Asian 11.8%Black 6.2%Native American 2.7%
GroupCA-HD-31StateNational
Hispanic / Latino
64.2%40.2%19.3%
White (Non-Hispanic)
15.3%33.8%57.4%
Asian
11.8%15.5%6.0%
Black / African American
6.2%5.4%12.2%
Native American / Alaska Native
2.7%1.3%0.9%
Native Hawaiian / Pacific Islander
0.1%0.4%0.2%
Method notes

Census treats race and Hispanic/Latino origin as separate questions. Race categories other than Hispanic reflect total populations (small Hispanic overlap in Black, Asian, AIAN, NHPI). “Multiracial / Other” is derived as a non-overlapping remainder.

Detailed ancestry data unavailable for this geography.

Who lives in California Assembly District 31? 495,465 residents as of the 2020 Census.

Demographic Comparison

Demographics

Read this geography's profile in three layers: local, state (where available), and national baseline.
CA-HD-31 vs California vs National495K residents
Population & electorate

Scale, voting-age share, and this geography's footprint inside the national electorate.

Total population
Local vs state vs U.S.
495K
local
495KState 39.3MNational 334.9M
Share of U.S. population
Local vs state vs U.S.
0.15%
local
0.15%National 100%
Voting-age population
Local vs state vs U.S.
70.3%
local
70.3%State 75.8%National 75.7%
Economic profile

Income, attainment, and ownership indicators that often shape coalition structure and turnout behavior.

Median household income
Local vs state vs U.S.
N/A
local
N/AState $102,676National $83,960
Poverty rate
Local vs state vs U.S.
N/A
local
N/AState 12.0%National 12.5%
College degree
Local vs state vs U.S.
N/A
local
N/AState 36.6%National 35.6%
Homeownership
Local vs state vs U.S.
N/A
local
N/AState 55.9%National 65.2%
Community profile

Age structure, language use, and nativity signals that explain how this geography differs from state and nation.

Median age
Local vs state vs U.S.
N/A
local
N/AState 37.9 yrsNational 39.1 yrs
Age 18–29
Local vs state vs U.S.
N/A
local
N/AState 16.2%National 15.7%
Age 65+
Local vs state vs U.S.
N/A
local
N/AState 15.7%National 17.0%
Foreign born
Local vs state vs U.S.
N/A
local
N/AState 27.0%National 14.1%
Non-English at home
Local vs state vs U.S.
N/A
local
N/AState 44.4%National 22.2%
English only
Local vs state vs U.S.
N/A
local
N/AState 55.6%National 77.8%
Voter Turnout

Turnout in CA-HD-31

Estimated using 2020 Census voting-age population.
2024 Turnout
34.6%
vs Previous
-57.4pp
Voting-Age Pop
348,452
History
2008–2024
Competitiveness

How competitive is CA-HD-31?

Safe DAvg margin: D+21.2 (last 3 elections)
2008
D+27.6
2012
D+31.7
2016
D+32.8
2020
D+17.6
2024
D+13.1
Elasticity
19.7pp
margin range
Party Flips
0
last 30 years
5-Elec Avg
D+24.6

Other California State House Districts

79 total
NameMargin ↓
CA-HD-18D+72.1
CA-HD-14D+71.3
CA-HD-17D+67.3
CA-HD-55D+62.2
CA-HD-19D+57.5
CA-HD-61D+56.8
CA-HD-12D+55.5
CA-HD-23D+54.5
CA-HD-52D+53.6
CA-HD-57D+52.6
CA-HD-51D+52.0
CA-HD-21D+50.6
CA-HD-26D+45.3
CA-HD-28D+43.9
CA-HD-54D+43.8
CA-HD-65D+43.5
CA-HD-20D+40.4
CA-HD-69D+38.2
CA-HD-16D+36.5
CA-HD-78D+36.3
CA-HD-02D+34.9
CA-HD-06D+34.0
CA-HD-44D+32.9
CA-HD-25D+32.4
CA-HD-15D+31.8
Upgrade Path

Unlock Legislative District Analytics

Advance from the public dossier into precinct-level, insight-rich district intelligence.
Target plan Pro$33/mo
Precinct data, Smart Insights, full history, and export controls tailored to place pages.
Precinct-Level Data
See results for every neighborhood and voting precinct
Smart Insights
Automated highlights from recent election patterns
Full Historical Access
165 years of election data at every level of geography
CSV Exports
Download any table or chart as a CSV file
Upgrade to Pro$33/mo