Mercer County, Ohio: Farm Belt county. In 2024, voted R+67%. Republican peak: R+67 in 2024.
Key facts
- 2024 presidential margin
- R+67MIT Election Lab
- Political typology
- Farm BeltAkashic typology
- Population
- 42,4842024 5-year
- Median household income
- $76,7822024 5-year
- White (non-Hispanic)
- 94.9%2024 5-year
- Black
- 1.2%2024 5-year
- Hispanic / Latino
- 2.2%2024 5-year
- Peak Democratic margin
- D+43 in 1932MIT Election Lab
- Peak Republican margin
- R+67 in 2024MIT Election Lab
- Most similar
- Fulton County, PA · similarity 1.00
2024 results by precinct
2024 precinct map of Mercer CountyPrecinct-level 2024 presidential results for Mercer 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 | +36.6% |
| 1896 | +41.0% |
| 1900 | +37.2% |
| 1904 | +19.8% |
| 1908 | +34.3% |
| 1912 | +39.9% |
| 1916 | +28.5% |
| 1920 | −12.7% |
| 1924 | +8.8% |
| 1928 | +9.1% |
| 1932 | +43.2% |
| 1936 | +27.4% |
| 1940 | −21.4% |
| 1944 | −26.1% |
| 1948 | +5.9% |
| 1952 | −31.4% |
| 1956 | −37.8% |
| 1960 | −0.0% |
| 1964 | +39.5% |
| 1968 | +3.4% |
| 1972 | −18.7% |
| 1976 | −6.4% |
| 1980 | −20.6% |
| 1984 | −44.1% |
| 1988 | −38.0% |
| 1992 | −20.5% |
| 1996 | −14.3% |
| 2000 | −39.8% |
| 2004 | −50.4% |
| 2008 | −43.4% |
| 2012 | −54.2% |
| 2016 | −64.0% |
| 2020 | −64.9% |
| 2024 | −66.5% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 3,865 | 19,710 | 23,826 | ||
| R | 4,030 | 19,452 | 23,761 | ||
| R | 3,384 | 17,506 | 22,053 | ||
| R | 4,745 | 16,561 | 21,818 | ||
| R | 5,853 | 15,100 | 21,299 | ||
| R | 5,118 | 15,650 | 20,890 | ||
| R | 5,212 | 12,485 | 18,294 | ||
| R | 6,300 | 8,832 | 17,653 | ||
| R | 4,883 | 8,683 | 18,545 | ||
| R | 4,978 | 11,162 | 16,286 | ||
| R | 4,422 | 11,542 | 16,144 | ||
| R | 5,506 | 8,673 | 15,339 | ||
| R | 6,724 | 7,678 | 14,849 | ||
| R | 5,798 | 8,587 | 14,907 | ||
| D | 6,801 | 6,313 | 14,209 | ||
| D | 10,081 | 4,373 | 14,454 | ||
| R | 7,730 | 7,735 | 15,465 | ||
| R | 4,272 | 9,456 | 13,728 | ||
| R | 4,725 | 9,058 | 13,783 | ||
| D | 5,928 | 5,266 | 11,202 | ||
| R | 4,522 | 7,712 | 12,234 | ||
| R | 5,114 | 7,905 | 13,019 | ||
| D | 7,217 | 3,602 | 13,204 | ||
| D | 8,462 | 3,314 | 11,929 | ||
| D | 6,155 | 5,129 | 11,326 | ||
| D | 5,135 | 4,215 | 10,434 | ||
| R | 4,404 | 5,692 | 10,140 | ||
| D | 3,803 | 2,065 | 6,107 | ||
| D | 3,591 | 1,324 | 5,683 | ||
| D | 4,456 | 2,148 | 6,729 | ||
| D | 3,286 | 2,173 | 5,615 | ||
| D | 4,460 | 2,015 | 6,566 | ||
| D | 4,790 | 1,991 | 6,827 | ||
| D | 3,688 | 1,526 | 5,900 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
53.8%
Irish
8.5%
American
7.3%
English
5.6%
French
2.3%
Italian
1.3%
Scottish
0.9%
African American
1.0%
Multiple ancestry combinations reported; no single grouping above 1%.
Sample size too small to break out by ancestry reliably.
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: 39.4 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
$76,782
Mercer County ranks in the top 25% of US counties.
Mercer County$76,782
Ohio$71,389
United States$80,734
Mercer County ranks in the top 25% 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
7.3%
Child poverty is below the national average.
Children under 187.1%
Working age (18–64)7.6%
Seniors (65+)5.1%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
97.9%
speak English only
Spanish1.1%
Other Indo-European0.5%
Asian & Pacific Islander0.5%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 22.5% of residents not counted as adherents by any reporting body.
Mercer County's R+66.7 margin in 2024 placed it among the most one-sided presidential results in the state, reflecting a heavily rural, agricultural population concentrated around Celina with deep roots in German Catholic heritage.
The Republican margin here reached sixty-seven points in 2024. Between 2020 and 2024 the county moved two points toward the Republican candidate; the 2024 margin was sixty-seven points.
A population of 42,484, a 95% non-Hispanic-white share, and a median household income of $76,782 describe an agricultural county. The county's voting pattern over the last decade is most similar to that of Fulton County and Appomattox 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.
Mercer County, Ohio. Akashic. https://akashic.app/county/39107/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More farm belt counties
Frequently asked questions
How did Mercer County, Ohio vote in 2024?
In 2024, Mercer County, Ohio voted Republican by 66.5 points (R+67), carried by the Republican candidate. Out of 23,826 votes cast, 3,865 went Democratic and 19,710 went Republican.
What is Mercer County, Ohio's political typology?
Akashic places Mercer County, Ohio in the "Farm Belt" typology — Rural Plains and Midwest farm counties — Republican, with modest recent movement. 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 14 times, Republican 20 times, and other 0 times.
When did Mercer County, Ohio last vote Democratic?
The most recent presidential election in which Mercer County, Ohio voted Democratic was 1968.
How many people live in Mercer County, Ohio?
Mercer County, Ohio has a population of 42,484 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Mercer County, Ohio?
Median household income in Mercer County, Ohio is $76,782 — below the national median of $80,734. The Ohio state median is $71,389.
What is the political history of Mercer County, Ohio?
Akashic tracks 38 presidential elections in Mercer County, Ohio from 1876 to 2024. Of those, 14 went Democratic and 20 went Republican. The county's typology — "Farm Belt" — captures where that record, its demographics, and its recent swing place it among American communities.