state house districtCalifornia 12th State House District
presidential margin
2004–2024 · Democratic minus Republican
2004D+42.3
2008D+54.7
2012D+48.7
2016D+56.2
2020D+59.5
2024D+55.5
net swing · 2004→2024D+13.2D+42.3 → D+55.5
vs. U.S. · 2024D+57.0D+55.5 vs R+1.5
presidential returns
2024 turnout 73.7% of 346,195 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
194,650
52,936
7,677
255,263
346,195
73.7%
2020
214,257
52,354
5,714
272,325
347,773†
78.3%
2016
176,702
44,241
14,757
235,700
342,168†
68.9%
2012
164,225
54,229
7,379
225,833
328,732†
68.7%
2008
179,330
52,340
603
232,273
319,580†
72.7%
2004
160,729
64,122
3,506
228,357
310,428†
73.6%
† 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 HD 12CaliforniaUnited States
English13.7%6.3%9.5%
German13.4%6.8%12.5%
Irish13.3%5.9%9.4%
Italian7.5%3.4%4.8%
French3.0%1.3%1.6%
Polish2.7%0.9%2.2%
Scottish2.6%0.9%1.3%
American2.5%2.8%5.3%
Mexican13.7%32.3%11.3%
Guatemalan3.7%1.3%0.5%
Salvadoran1.2%2.0%0.7%
Spanish0.6%0.3%—
Spaniard0.5%0.3%—
Puerto Rican0.5%0.6%1.8%
Peruvian0.5%——
Nicaraguan0.3%0.3%—
Chinese1.5%3.9%1.3%
Filipino1.1%3.3%0.9%
Asian Indian0.9%2.3%1.4%
Vietnamese0.7%1.7%0.6%
Korean0.4%1.2%0.4%
Japanese0.4%0.6%0.2%
African American†1.5%4.4%9.9%
Aztec3.1%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 HD 12
California
United States
Median age
44.7
37.9
39.1
Age 18–24
7.3%
9.1%
9.2%
Age 65 and older
23.0%
15.6%
17.2%
Household economy
Measure
CA HD 12
California
United States
Median household income
$122,418
$99,122
$84,427
Poverty rate
8.5%
12.0%
12.5%
Bachelor's degree or higher (25+)
53.9%
36.6%
35.6%
Languages at home
Measure
CA HD 12
California
United States
Speaks a non-English language at home
24.9%
44.4%
22.3%
Spanish
16.1%
28.4%
13.6%
Other Indo-European
2.6%
3.4%
2.0%
Other Asian & Pacific Island
1.0%
2.0%
1.1%
Religious landscape
Measure
CA HD 12
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 12th State House District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+42.3%
2008
+54.7%
2012
+48.7%
2016
+56.2%
2020
+59.5%
2024
+55.5%
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
76.3%Harris194,650
20.7%Trump52,936
3.0%
D+55.5
R+3.9
D+57.0
255,263
D
78.7%Biden214,257
19.2%Trump52,354
2.1%
D+59.5
D+3.3
D+55.0
272,325
D
75.0%Clinton176,702
18.8%Trump44,241
6.3%
D+56.2
D+7.5
D+54.1
235,700
D
72.7%Obama164,225
24.0%Romney54,229
3.3%
D+48.7
R+6.0
D+44.9
225,833
D
77.2%Obama179,330
22.5%McCain52,340
0.3%
D+54.7
D+12.4
D+47.4
232,273
D
70.4%Kerry160,729
28.1%Bush64,122
1.5%
D+42.3
—
D+44.8
228,357
current representation
Current officeholders
DDamon ConnollyState House · 12
State legislative officeholder from OpenStates nightly current-legislator data.
Assembly District 12 recorded a D+55.5 presidential margin in 2024, placing it among the most heavily one-sided state house seats in California. Its composition likely reflects dense urban precincts where partisan lean is reinforced by high population concentration.
Across the recorded series it reached a Democratic high of 59.5 points in 2020. Between 2020 and 2024 the district moved 3.9 points toward the Republican candidate; the 2024 margin was 55.5 points.
A population of 486,142, a 62% non-Hispanic-white share, and a median household income of $122,418 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 8 and Assembly District 14.
Akashic
Political twins — state-house districts
The state-house 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 12th State House District. Akashic. https://akashic.app/sld-lower/06012/. Accessed May 20, 2026. License: CC BY 4.0.
How did California 12th State House District vote in 2024?
In 2024, California 12th State House District voted Democratic by 55.5 points (D+55.5), carried by the Democratic candidate. Out of 255,263 votes cast, 194,650 went Democratic and 52,936 went Republican.
How many people live in California 12th State House District?
California 12th State House District has a population of 486,142 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in California 12th State House District?
Median household income in California 12th State House District is $122,418 — above the national median of $80,734. The California state median is $99,122.
What is the political history of California 12th State House District?
Akashic tracks 6 presidential elections in California 12th State House District from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
