Eureka · how this place’s counties split between candidates in each party’s presidential nominating contest, cycle by cycle. A primary is a contest inside one party, so it has no Democratic–Republican margin and is not part of the general-election record above.
Akashic reports votes cast, not delegates awarded. The two can disagree: Clinton led the 2008 national primary popular vote by less than half a point and did not win the nomination.
Primary returns are published at county grain and there is no roll-up above it. Each cell counts how many of this place’s counties a candidate led — a count of records, not a vote total. Who led the place as a whole is not knowable from these returns, because county rows carry a leader and a lead but no per-candidate votes.
Presidential nominating contests in Eureka, by party and cycle.
○no contest record — Akashic holds no result for that party and cycle here. It is not a claim that no contest was held. Telling apart a contest that was cancelled, one that went uncontested, and one simply not yet ingested needs a nominating-contest calendar, which is a separate ingest from results and does not exist yet.
Republican presidential primaries are not yet ingested — the Republican series runs from 1856 and is in scope. The row is kept so its absence is visible: a Democratic-only panel would otherwise read as though no one else held a contest.
Akashic carries 10 states for 2012 and 3 states for 2024. Cycles in which an incumbent president seeks renomination are thin by nature — few states run a contested primary — so a sparse column is politics, not a hole in the record.
County returns carry a leader and a lead over the runner-up, and nothing more. The full candidate field with vote shares is published at state grain — follow a cycle above to the state contest for it.
voter registration
Registered voters
By party of registration, over time
Party registration · 2024D+16.3
vs
Presidential vote · 2024D+22.1
Registration leans Democratic; the presidential vote runs 5.7 points more Democratic than the rolls.
96,880 registered voters · 2024 · down from 99,314 in 2022
Domestic migration in Eureka in Eureka: net domestic migration by year
Year
Net domestic migration
2011
−346
2012
−1,184
2013
−870
2014
−722
2015
+440
2016
+1,191
2017
+120
2018
+138
2019
−572
2021
−1,034
2022
−591
2023
−720
2024
−798
2025
−666
The Eureka market covers Humboldt and Del Norte counties on California's far-north coast. It voted Democratic by D+26.2 in 2020 and D+22.1 in 2024. Median household income was $62,149 in the 2024 ACS 5-year, below the national figure of $80,734.
Across the recorded series it reached a Democratic high of 34.2 points in 1912 and a Republican high of 52.7 points in 1904. Between 2020 and 2024 the market moved 4.2 points toward the Republican candidate; the 2024 margin was 22.1 points.
A population of 161,648, a 68% non-Hispanic-white share, and a median household income of $62,149 describe the market. The market's voting pattern over the last decade is most similar to that of Eugene and Juneau.
Akashic
Political twins — media markets
The media markets 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 →
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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Eureka, California. Akashic. https://akashic.app/dma/802/. Accessed May 20, 2026. License: CC BY 4.0.
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In 2024, Eureka, California voted Democratic by 22.1 points (D+22.1), carried by the Democratic candidate. Out of 74,792 votes cast, 44,066 went Democratic and 27,558 went Republican.
When did Eureka, California last vote Republican?
The most recent presidential election in which Eureka, California voted Republican was 1984.
How many people live in Eureka, California?
Eureka, California has a population of 161,648 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Eureka, California?
Median household income in Eureka, California is $62,149 — below the national median of $80,734. The California state median is $99,122.
What is the political history of Eureka, California?
Akashic tracks 34 presidential elections in Eureka, California from 1892 to 2024. Of those, 17 went Democratic and 16 went Republican.
