† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. 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
GroupEurekaIllinoisUnited States
German38.9%16.1%12.5%
English12.0%6.9%9.5%
Irish11.6%10.6%9.4%
American5.2%3.3%5.3%
Italian3.6%5.4%4.8%
Polish3.0%6.0%2.2%
Swedish2.8%1.5%—
French2.2%0.7%1.6%
Mexican2.0%14.4%11.3%
Cuban0.3%0.2%0.7%
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
Eureka
Illinois
United States
Median age
42.2
39.1
39.1
Age 18–24
14.2%
9.1%
9.2%
Age 65 and older
24.5%
16.9%
17.2%
Household economy
Measure
Eureka
Illinois
United States
Median household income
$56,048
$83,390
$84,427
Poverty rate
10.8%
11.8%
12.5%
Bachelor's degree or higher (25+)
32.2%
37.9%
35.6%
Languages at home
Measure
Eureka
Illinois
United States
Speaks a non-English language at home
2.4%
24.1%
22.3%
Spanish
1.7%
14.0%
13.6%
Religious landscape
Measure
Eureka
Illinois
United States
Catholic
—
24.2%
18.6%
Evangelical Protestant
—
11.7%
16.5%
Unclaimed / not counted
—
49.2%
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.
Eureka, Illinois
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
−42.2%
2008
−32.6%
2012
−44.6%
2016
−40.5%
2020
−39.7%
2024
−43.1%
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
27.0%Harris712
70.1%Trump1,848
3.0%
R+43.1
R+3.4
R+41.6
2,638
R
28.9%Biden753
68.6%Trump1,786
2.5%
R+39.7
D+0.8
R+44.1
2,604
R
25.4%Clinton624
65.9%Trump1,616
8.6%
R+40.5
D+4.2
R+42.5
2,452
R
26.6%Obama642
71.2%Romney1,719
2.2%
R+44.6
R+12.1
R+48.5
2,413
R
32.6%Obama821
65.1%McCain1,641
2.3%
R+32.6
D+9.7
R+39.8
2,519
R
28.7%Kerry695
70.9%Bush1,718
0.4%
R+42.2
—
R+39.8
2,422
Eureka anchors Woodford County, one of Illinois's most reliably conservative rural counties, where Republican presidential candidates have routinely cleared 70% of the vote over the past decade.
Across the recorded series it reached a Republican high of 44.6 points in 2012. Between 2020 and 2024 the city moved 3.4 points toward the Republican candidate; the 2024 margin was 43.1 points.
A population of 5,007, a 92% non-Hispanic-white share, and a median household income of $56,048 describe the city. The city's voting pattern over the last decade is most similar to that of Holdrege and Sturgis.
Akashic
Political twins — cities
The cities 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.
In 2024, Eureka, Illinois voted Republican by 43.1 points (R+43.1), carried by the Republican candidate. Out of 2,638 votes cast, 712 went Democratic and 1,848 went Republican.
How many people live in Eureka, Illinois?
Eureka, Illinois has a population of 5,007 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Eureka, Illinois?
Median household income in Eureka, Illinois is $56,048 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Eureka, Illinois?
Akashic tracks 6 presidential elections in Eureka, Illinois from 2004 to 2024. Of those, 0 went Democratic and 6 went Republican.
