state senate districtCalifornia 31st State Senate District
presidential margin
2004–2024 · Democratic minus Republican
2004D+1.7
2008D+21.6
2012D+25.2
2016D+28.2
2020D+24.4
2024D+7.6
net swing · 2004→2024D+6.0D+1.7 → D+7.6
vs. U.S. · 2024D+9.1D+7.6 vs R+1.5
presidential returns
2024 turnout 48.3% of 608,365 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
153,535
131,131
8,981
293,647
608,365
48.3%
2020
202,958
121,910
7,291
332,159
584,751†
56.8%
2016
152,084
81,956
14,446
248,486
534,444†
46.5%
2012
133,973
78,952
5,249
218,174
485,813†
44.9%
2008
122,903
79,027
925
202,855
438,647†
46.2%
2004
87,944
85,046
2,052
175,042
391,480†
44.7%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupCA SD 31CaliforniaUnited States
Mexican53.4%32.3%11.3%
Salvadoran1.6%2.0%0.7%
Guatemalan1.3%1.3%0.5%
Puerto Rican0.9%0.6%1.8%
Spaniard0.6%0.3%—
Colombian0.5%0.3%0.4%
Spanish0.5%0.3%—
Cuban0.4%—0.7%
German6.0%6.8%12.5%
English5.5%6.3%9.5%
Irish4.8%5.9%9.4%
Italian2.7%3.4%4.8%
American2.5%2.8%5.3%
French1.1%1.3%1.6%
Scottish1.0%0.9%1.3%
Polish0.9%0.9%2.2%
African American†7.7%4.4%9.9%
African0.4%0.3%0.5%
Nigerian0.3%—0.2%
Filipino2.7%3.3%0.9%
Chinese1.2%3.9%1.3%
Asian Indian0.9%2.3%1.4%
Vietnamese0.9%1.7%0.6%
Korean0.4%1.2%0.4%
Japanese0.2%0.6%0.2%
Pakistani0.2%——
Aztec12.7%0.3%—
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
CA SD 31
California
United States
Median age
33.3
37.9
39.1
Age 18–24
9.4%
9.1%
9.2%
Age 65 and older
15.4%
15.6%
17.2%
Household economy
Measure
CA SD 31
California
United States
Median household income
$91,787
$99,122
$84,427
Poverty rate
11.6%
12.0%
12.5%
Bachelor's degree or higher (25+)
25.6%
36.6%
35.6%
Languages at home
Measure
CA SD 31
California
United States
Speaks a non-English language at home
42.4%
44.4%
22.3%
Spanish
35.0%
28.4%
13.6%
Other Indo-European
1.4%
3.4%
2.0%
Chinese (incl. Mandarin & Cantonese)
1.1%
3.5%
1.1%
Tagalog (incl. Filipino)
1.5%
2.1%
0.6%
Religious landscape
Measure
CA SD 31
California
United States
Catholic
—
26.2%
18.6%
Evangelical Protestant
—
9.0%
16.5%
Unclaimed / not counted
—
55.2%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
California 31st State Senate District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+1.7%
2008
+21.6%
2012
+25.2%
2016
+28.2%
2020
+24.4%
2024
+7.6%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
52.3%Harris153,535
44.7%Trump131,131
3.1%
D+7.6
R+16.8
D+9.1
293,647
D
61.1%Biden202,958
36.7%Trump121,910
2.2%
D+24.4
R+3.8
D+19.9
332,159
D
61.2%Clinton152,084
33.0%Trump81,956
5.8%
D+28.2
D+3.0
D+26.1
248,486
D
61.4%Obama133,973
36.2%Romney78,952
2.4%
D+25.2
D+3.6
D+21.4
218,174
D
60.6%Obama122,903
39.0%McCain79,027
0.5%
D+21.6
D+20.0
D+14.4
202,855
D
50.2%Kerry87,944
48.6%Bush85,046
1.2%
D+1.7
—
D+4.1
175,042
current representation
Current officeholders
DSabrina CervantesState Senate · 31
State legislative officeholder from OpenStates nightly current-legislator data.
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.
Across the recorded series it reached a Democratic high of 28.2 points in 2016. Between 2020 and 2024 the district moved 16.8 points toward the Republican candidate; the 2024 margin was 7.6 points.
A population of 950,526, a 19% non-Hispanic-white share, and a median household income of $91,787 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 29 and State Senate District 14.
Akashic
Political twins — state-senate districts
The state-senate districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
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.
California 31st State Senate District. Akashic. https://akashic.app/sld-upper/06031/. Accessed May 20, 2026. License: CC BY 4.0.
How did California 31st State Senate District vote in 2024?
In 2024, California 31st State Senate District voted Democratic by 7.6 points (D+7.6), carried by the Democratic candidate. Out of 293,647 votes cast, 153,535 went Democratic and 131,131 went Republican.
How many people live in California 31st State Senate District?
California 31st State Senate District 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 California 31st State Senate District?
Median household income in California 31st State Senate District is $91,787 — above the national median of $80,734. The California state median is $99,122.
What is the political history of California 31st State Senate District?
Akashic tracks 6 presidential elections in California 31st State Senate District from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
