Union County, Ohio: Realigning Affluent Suburb county. In 2024, voted R+29%. Republican peak: R+56 in 1984.
Key facts
- 2024 presidential margin
- R+29MIT Election Lab
- Political typology
- Realigning Affluent SuburbAkashic typology
- Population
- 67,3242024 5-year
- Median household income
- $112,3222024 5-year
- White (non-Hispanic)
- 85.2%2024 5-year
- Black
- 2.3%2024 5-year
- Hispanic / Latino
- 3.4%2024 5-year
- Peak Democratic margin
- D+5 in 1912MIT Election Lab
- Peak Republican margin
- R+56 in 1984MIT Election Lab
- Most similar
- Hamilton County, NY · similarity 1.00
2024 results by precinct
2024 precinct map of Union CountyPrecinct-level 2024 presidential results for Union County, with each precinct boundary colored by Democratic-vs-Republican margin.
—
Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
presidential history
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | No data |
| 1880 | No data |
| 1884 | No data |
| 1888 | No data |
| 1892 | −17.1% |
| 1896 | −11.8% |
| 1900 | −17.5% |
| 1904 | −30.1% |
| 1908 | −16.0% |
| 1912 | +5.4% |
| 1916 | −7.2% |
| 1920 | −33.0% |
| 1924 | −32.0% |
| 1928 | −41.9% |
| 1932 | +0.3% |
| 1936 | −4.7% |
| 1940 | −29.3% |
| 1944 | −40.8% |
| 1948 | −30.8% |
| 1952 | −46.4% |
| 1956 | −48.1% |
| 1960 | −43.1% |
| 1964 | −4.9% |
| 1968 | −38.9% |
| 1972 | −53.8% |
| 1976 | −25.6% |
| 1980 | −40.6% |
| 1984 | −56.3% |
| 1988 | −47.4% |
| 1992 | −29.5% |
| 1996 | −22.0% |
| 2000 | −38.0% |
| 2004 | −40.7% |
| 2008 | −27.9% |
| 2012 | −29.1% |
| 2016 | −37.1% |
| 2020 | −31.5% |
| 2024 | −29.4% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 12,934 | 23,982 | 37,567 | ||
| R | 11,141 | 21,669 | 33,445 | ||
| R | 7,718 | 18,096 | 27,959 | ||
| R | 8,805 | 16,289 | 25,762 | ||
| R | 8,761 | 15,744 | 24,984 | ||
| R | 6,665 | 15,870 | 22,631 | ||
| R | 5,040 | 11,502 | 17,024 | ||
| R | 4,989 | 8,290 | 15,003 | ||
| R | 3,465 | 7,818 | 14,777 | ||
| R | 3,130 | 8,846 | 12,071 | ||
| R | 2,579 | 9,336 | 12,001 | ||
| R | 3,038 | 7,576 | 11,186 | ||
| R | 4,377 | 7,464 | 12,043 | ||
| R | 2,447 | 8,389 | 11,054 | ||
| R | 2,431 | 6,415 | 10,238 | ||
| R | 4,985 | 5,504 | 10,489 | ||
| R | 3,116 | 7,838 | 10,954 | ||
| R | 2,653 | 7,575 | 10,228 | ||
| R | 2,843 | 7,761 | 10,604 | ||
| R | 3,008 | 5,688 | 8,713 | ||
| R | 2,907 | 6,908 | 9,815 | ||
| R | 3,947 | 7,214 | 11,161 | ||
| R | 5,157 | 5,673 | 10,950 | ||
| D | 4,943 | 4,912 | 9,969 | ||
| R | 2,386 | 5,876 | 8,331 | ||
| R | 2,571 | 5,256 | 8,378 | ||
| R | 3,286 | 6,544 | 9,865 | ||
| R | 2,747 | 3,182 | 6,007 | ||
| D | 2,362 | 2,051 | 5,807 | ||
| R | 2,568 | 3,567 | 6,253 | ||
| R | 1,924 | 3,646 | 5,723 | ||
| R | 2,484 | 3,561 | 6,151 | ||
| R | 2,736 | 3,476 | 6,279 | ||
| R | 2,055 | 3,001 | 5,531 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
26.2%
English
13.9%
Irish
13.1%
American
11.5%
Italian
5.5%
Scottish
3.2%
Polish
1.9%
African American
1.8%
Multiple ancestry combinations reported; no single grouping above 1%.
American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
2024 ACS
Age distribution by sex
Median age: 38.5 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
Inflation-adjusted dollars
$112,322
Union County ranks in the top 0.5% of US counties.
Union County$112,322
Ohio$71,389
United States$80,734
Union County ranks in the top 0.5% of US counties by median household income.
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
5.0%
Child poverty is below the national average.
Children under 184.0%
Working age (18–64)5.0%
Seniors (65+)9.4%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
92.1%
speak English only
Asian & Pacific Islander3.0%
Other Indo-European2.4%
Spanish1.9%
Other languages0.7%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 69.2% of residents not counted as adherents by any reporting body.
Union County sits northwest of Columbus and has absorbed significant suburban spillover growth, yet its presidential margins have remained consistently above R+25 since 2000, suggesting new residents skew toward the county's existing political profile.
Once reliably Republican — a margin of fifty-six points in 1984 at its widest — Union County has trended Democratic. Between 2020 and 2024 the county moved two points toward the Democratic candidate; the 2024 margin was twenty-nine points.
A median household income of $112,322 — among the higher at this geographic scale — and a population of 67,324 describe the county. The county's voting pattern over the last decade is most similar to that of Hamilton County and Greene County.
Most similar counties
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.
Union County, Ohio. Akashic. https://akashic.app/county/39159/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Frequently asked questions
How did Union County, Ohio vote in 2024?
In 2024, Union County, Ohio voted Republican by 29.4 points (R+29), carried by the Republican candidate. Out of 37,567 votes cast, 12,934 went Democratic and 23,982 went Republican.
What is Union County, Ohio's political typology?
Akashic places Union County, Ohio in the "Realigning Affluent Suburb" typology — College-educated, affluent suburbs — the one bloc moving toward the Democratic Party. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 38 elections in the dataset, the county has voted Democratic 2 times, Republican 32 times, and other 0 times.
When did Union County, Ohio last vote Democratic?
The most recent presidential election in which Union County, Ohio voted Democratic was 1932.
How many people live in Union County, Ohio?
Union County, Ohio has a population of 67,324 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Union County, Ohio?
Median household income in Union County, Ohio is $112,322 — above the national median of $80,734. The Ohio state median is $71,389.
What is the political history of Union County, Ohio?
Akashic tracks 38 presidential elections in Union County, Ohio from 1876 to 2024. Of those, 2 went Democratic and 32 went Republican. The county's typology — "Realigning Affluent Suburb" — captures where that record, its demographics, and its recent swing place it among American communities.