state senate districtCalifornia 1st State Senate District
presidential margin
2004–2024 · Democratic minus Republican
2004R+25.0
2008R+12.4
2012R+16.7
2016R+19.3
2020R+15.7
2024R+20.8
net swing · 2004→2024D+4.2R+25.0 → R+20.8
vs. U.S. · 2024R+19.4R+20.8 vs R+1.5
presidential returns
2024 turnout 62.1% of 691,699 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
163,805
253,288
12,542
429,635
691,699
62.1%
2020
187,697
259,782
11,250
458,729
689,741†
66.5%
2016
143,568
218,705
27,936
390,209
676,454†
57.7%
2012
149,767
212,418
13,629
375,814
660,974†
56.9%
2008
170,895
219,500
2,813
393,208
642,901†
61.2%
2004
141,081
237,211
6,149
384,441
624,827†
61.5%
† 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 1CaliforniaUnited States
German12.5%6.8%12.5%
English12.3%6.3%9.5%
Irish10.3%5.9%9.4%
Italian4.9%3.4%4.8%
American4.6%2.8%5.3%
Scottish2.3%0.9%1.3%
French2.1%1.3%1.6%
Norwegian1.3%——
Mexican14.1%32.3%11.3%
Spanish0.5%0.3%—
Spaniard0.5%0.3%—
Puerto Rican0.4%0.6%1.8%
Salvadoran0.2%2.0%0.7%
Guatemalan0.2%1.3%0.5%
Asian Indian1.1%2.3%1.4%
Hmong0.8%0.3%—
Filipino0.7%3.3%0.9%
Chinese0.4%3.9%1.3%
Vietnamese0.2%1.7%0.6%
African American†1.0%4.4%9.9%
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 1
California
United States
Median age
40.3
37.9
39.1
Age 18–24
9.0%
9.1%
9.2%
Age 65 and older
20.3%
15.6%
17.2%
Household economy
Measure
CA SD 1
California
United States
Median household income
$72,530
$99,122
$84,427
Poverty rate
14.8%
12.0%
12.5%
Bachelor's degree or higher (25+)
27.6%
36.6%
35.6%
Languages at home
Measure
CA SD 1
California
United States
Speaks a non-English language at home
18.3%
44.4%
22.3%
Spanish
12.0%
28.4%
13.6%
Other Indo-European
2.3%
3.4%
2.0%
Other Asian & Pacific Island
1.4%
2.0%
1.1%
Religious landscape
Measure
CA SD 1
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 1st State Senate District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
−25.0%
2008
−12.4%
2012
−16.7%
2016
−19.3%
2020
−15.7%
2024
−20.8%
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
R
38.1%Harris163,805
59.0%Trump253,288
2.9%
R+20.8
R+5.1
R+19.4
429,635
R
40.9%Biden187,697
56.6%Trump259,782
2.5%
R+15.7
D+3.5
R+20.2
458,729
R
36.8%Clinton143,568
56.0%Trump218,705
7.2%
R+19.3
R+2.6
R+21.3
390,209
R
39.9%Obama149,767
56.5%Romney212,418
3.6%
R+16.7
R+4.3
R+20.5
375,814
R
43.5%Obama170,895
55.8%McCain219,500
0.7%
R+12.4
D+12.6
R+19.6
393,208
R
36.7%Kerry141,081
61.7%Bush237,211
1.6%
R+25.0
—
R+22.5
384,441
current representation
Current officeholders
RMegan DahleState Senate · 1
State legislative officeholder from OpenStates nightly current-legislator data.
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 25.0 points in 2004. 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 60% 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 12.
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 1st State Senate District. Akashic. https://akashic.app/sld-upper/06001/. Accessed May 20, 2026. License: CC BY 4.0.
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 6 presidential elections in California 1st State Senate District from 2004 to 2024. Of those, 0 went Democratic and 6 went Republican.
