Akashic
1892–2024
Akashic
California 1st State Senate District
presidential margin
2008R+12.42012R+17.32016R+19.32020R+15.72024R+20.8
full record · 2008 → 2024
R+20.8
2024
median income$72,530U.S. $80,734 · CA $99,122
median age40.3U.S. 39.1 · CA 37.9
poverty rate14.8%U.S. 12.5% · CA 12.0%
bachelor’s+ (25+)27.6%U.S. 35.6% · CA 36.6%
non-english18.3%U.S. 22.3% · CA 44.4%
race · ethnicity · ancestry
German12.5%
English12.3%
Irish10.3%
Mexican14.1%
Spanish0.5%
Spaniard0.5%
Asian Indian1.1%
Hmong0.8%
Filipino0.7%
African American†1.0%
religion

Religious adherence is published only at the county level (U.S. Religion Census). See Plumas County.

American Community Survey 2024 5-year (income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024.

California 1st State Senate District

Akashic
California 1st State Senate DistrictTrumpR+20.8
2024
2024 presidential margin for California 1st State Senate DistrictThe boundary of California 1st State Senate District, filled by its 2024 presidential margin (R+20.8), over faint outlines of the counties it is drawn from.California 1st State Senate District · R+20.8
How it voted
Share of the 2024 vote
Donald Trump ✓Republican59.0%253,288
Kamala HarrisDemocratic38.1%163,805
Robert F. Kennedy Jr.American Independent2.9%12,542
D+60
R+60
District boundary, filled by its own 2024 D-vs-R margin — precinct detail where available, over the 14 counties it's drawn from (shown faint).
The precinct map shows the 2024 presidential vote; the timeline scrubs the district’s overall result across 1892–2024, on its current boundaries.
County-level results (14 counties) — table
2024 presidential result by county for California 1st State Senate District — winner and D-vs-R margin.
CountyWinnerMargin
Butte County, CARepublicanR+3.1
Colusa County, CARepublicanR+28.2
Glenn County, CARepublicanR+34.9
Lassen County, CARepublicanR+54.0
Modoc County, CARepublicanR+46.6
Nevada County, CADemocraticD+12.2
Placer County, CARepublicanR+8.5
Plumas County, CARepublicanR+16.9
Shasta County, CARepublicanR+36.4
Sierra County, CARepublicanR+24.2
Siskiyou County, CARepublicanR+19.2
Sutter County, CARepublicanR+31.4
Tehama County, CARepublicanR+41.8
Yuba County, CARepublicanR+25.8
5 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
YearWonDemocraticRepublicanOtherMarginTotal
R
38.1%Harris163,805
59.0%Trump253,288
2.9%Kennedy12,542
−20.8%
429,635
R
40.9%Biden187,697
56.6%Trump259,782
2.5%Jorgensen11,250
−15.7%
458,729
R
36.8%Clinton143,568
56.0%Trump218,705
7.2%Johnson27,936
−19.3%
390,209
R
41.4%Obama149,767
58.6%Romney212,418
0.0%
−17.3%
362,185
R
43.5%Obama170,895
55.8%McCain219,500
0.7%Nader2,813
−12.4%
393,208
presidential history
Presidential margin, 2008–2024
Democratic minus Republican, by election
Presidential margin over timeDemocratic-minus-Republican presidential margin from 2008 to 2024. Most recent: −20.8% in 2024.−20.8%DR20082024
Presidential margin over time
YearMargin (D minus R)
2008−12.4%
2012−17.3%
2016−19.3%
2020−15.7%
2024−20.8%
DemocraticRepublican
current representation
Current officeholders
RMegan DahleState Senate · 1

State legislative officeholder from OpenStates nightly current-legislator data.

Source · OpenStates current legislator CSV.

Anchored in the North Bay and coastal Northern California, this district recorded a 53.5-point Democratic presidential margin in 2024, placing it among the state's most reliably one-sided legislative constituencies.

Across the recorded series it reached a Republican high of 20.8 points in 2024. Between 2020 and 2024 the district moved 5.1 points toward the Republican candidate; the 2024 margin was 20.8 points.

A population of 943,031, a 64% non-Hispanic-white share, and a median household income of $72,530 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 4 and State Senate District 24.

Political twins — state-senate districts

The state-senate districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.

State Senate District 4
California
85.8twin score
population scale% unaffiliatedcollege share≠ Mexican ancestry
State Senate District 24
Texas
74.9twin score
population scale2008–2024 trajectory≠ % unaffiliated
State Senate District 12
California
73.3twin score
population scale2016–2024 trajectory≠ median age

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 1st State Senate District. Akashic. https://akashic.app/sld-upper/06001/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Places within California 1st State Senate District

counties it covers14
Butte CountyColusa CountyGlenn CountyLassen CountyModoc CountyNevada CountyPlacer CountyPlumas CountyShasta CountySierra CountySiskiyou CountySutter CountyTehama CountyYuba County

Frequently asked questions

How did California 1st State Senate District vote in 2024?
In 2024, California 1st State Senate District voted Republican by 20.8 points (R+20.8), carried by the Republican candidate. Out of 429,635 votes cast, 163,805 went Democratic and 253,288 went Republican.
How many people live in California 1st State Senate District?
California 1st State Senate District has a population of 943,031 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in California 1st State Senate District?
Median household income in California 1st State Senate District is $72,530 — below the national median of $80,734. The California state median is $99,122.
What is the political history of California 1st State Senate District?
Akashic tracks 5 presidential elections in California 1st State Senate District from 2008 to 2024. Of those, 0 went Democratic and 5 went Republican.