California 27th State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Joe Biden2020
63.6%
342,661 votes · D+29.1 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 62.6%
Republican
Herbert Hoover1928
72.7%
51,559 votes · R+47.4 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 72.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
342,661votes
63.6% of the vote · D+29.1 · modeled estimate
Runner-up · Kamala Harris, 2024 · 292,727 votes
Republican
Ronald Reagan1984
211,607votes
63.6% of the vote · R+28.4 · modeled estimate
Runner-up · Richard Nixon, 1972 · 193,844 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Hillary Clinton2016
+27.2pts D vs U.S.
Place D+29.3 · U.S. D+2.1 · modeled estimate
Runner-up · Joe Biden, 2020 · +24.6 pts
Republican
Calvin Coolidge1924
+37.6pts R vs U.S.
Place R+62.8 · U.S. R+25.2 · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · +32.5 pts
current representation
Current officeholders
DHenry SternState Senate · 27
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 2 House
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
Source · Akashic county-allocated estimate from certified county returns, House; not precinct-counted.
Year
Vote lead
Democratic
Republican
Total
2024
D
64.6%243,412
35.4%133,340
376,752
2018
D
71.2%218,478
28.8%88,288
306,766
California 27th State Senate District sits in the Pacific Coast. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 32.5 points in 1912 and a Republican high of 62.8 points in 1924. Between 2020 and 2024 the district moved 7.1 points toward the Republican candidate; the 2024 margin was 22.0 points.
A population of 991,307, a 36% non-Hispanic-white share, and a median household income of $112,200 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 24 and State Senate District 9.
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 → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
California 27th State Senate District. Akashic. https://akashic.app/sld-upper/06027/. Accessed May 20, 2026. License: CC BY 4.0.
How did California 27th State Senate District vote in 2024?
In 2024, California 27th State Senate District voted Democratic by 22.0 points (D+22.0), carried by the Democratic candidate. Out of 489,552 votes cast, 292,727 went Democratic and 185,259 went Republican.
When did California 27th State Senate District last vote Republican?
The most recent presidential election in which California 27th State Senate District voted Republican was 1988.
How many people live in California 27th State Senate District?
California 27th State Senate District has a population of 991,307 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in California 27th State Senate District?
Median household income in California 27th State Senate District is $112,200 — above the national median of $80,734. The California state median is $99,122.
What is the political history of California 27th State Senate District?
Akashic tracks 38 presidential elections in California 27th State Senate District from 1876 to 2024. Of those, 14 went Democratic and 23 went Republican.