Harrison County, Iowa: Farm Belt county. In 2024, voted R+42%. Republican peak: R+42 in 2024.
Key facts
- 2024 presidential margin
- R+42MIT Election Lab
- Political typology
- Farm BeltAkashic typology
- Population
- 14,6322024 5-year
- Median household income
- $79,5352024 5-year
- White (non-Hispanic)
- 94.9%2024 5-year
- Black
- 0.1%2024 5-year
- Hispanic / Latino
- 2.2%2024 5-year
- Peak Democratic margin
- D+36 in 1932MIT Election Lab
- Peak Republican margin
- R+42 in 2024MIT Election Lab
- Most similar
- Griggs County, ND · similarity 0.99
2024 results by precinct
2024 precinct map of Harrison CountyPrecinct-level 2024 presidential results for Harrison County, with each precinct boundary colored by Democratic-vs-Republican margin.
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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 | −2.0% |
| 1896 | +6.1% |
| 1900 | −7.4% |
| 1904 | −30.8% |
| 1908 | −8.8% |
| 1912 | +11.8% |
| 1916 | +5.7% |
| 1920 | −27.2% |
| 1924 | −19.0% |
| 1928 | −11.9% |
| 1932 | +35.6% |
| 1936 | +7.6% |
| 1940 | −6.8% |
| 1944 | −9.2% |
| 1948 | +3.0% |
| 1952 | −27.8% |
| 1956 | −16.8% |
| 1960 | −15.5% |
| 1964 | +17.6% |
| 1968 | −21.3% |
| 1972 | −32.8% |
| 1976 | −3.8% |
| 1980 | −33.3% |
| 1984 | −27.0% |
| 1988 | −3.7% |
| 1992 | −6.0% |
| 1996 | −7.6% |
| 2000 | −19.1% |
| 2004 | −23.1% |
| 2008 | −4.7% |
| 2012 | −12.7% |
| 2016 | −36.7% |
| 2020 | −38.4% |
| 2024 | −41.7% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 2,245 | 5,566 | 7,959 | ||
| R | 2,440 | 5,569 | 8,155 | ||
| R | 2,131 | 4,902 | 7,552 | ||
| R | 3,136 | 4,065 | 7,322 | ||
| R | 3,555 | 3,909 | 7,578 | ||
| R | 2,906 | 4,680 | 7,680 | ||
| R | 2,551 | 3,802 | 6,543 | ||
| R | 2,576 | 3,070 | 6,527 | ||
| R | 2,349 | 2,763 | 6,868 | ||
| R | 2,883 | 3,108 | 6,027 | ||
| R | 2,495 | 4,352 | 6,882 | ||
| R | 2,152 | 4,502 | 7,053 | ||
| R | 3,228 | 3,489 | 6,790 | ||
| R | 2,369 | 4,721 | 7,171 | ||
| R | 2,410 | 3,867 | 6,825 | ||
| D | 4,575 | 3,203 | 7,787 | ||
| R | 3,613 | 4,940 | 8,562 | ||
| R | 3,709 | 5,209 | 8,935 | ||
| R | 3,370 | 5,972 | 9,366 | ||
| D | 4,608 | 4,341 | 9,016 | ||
| R | 4,201 | 5,059 | 9,309 | ||
| R | 5,317 | 6,094 | 11,428 | ||
| D | 6,206 | 5,314 | 11,678 | ||
| D | 7,427 | 3,513 | 11,008 | ||
| R | 4,406 | 5,605 | 10,046 | ||
| R | 3,179 | 5,062 | 9,924 | ||
| R | 3,479 | 6,127 | 9,742 | ||
| D | 2,932 | 2,610 | 5,689 | ||
| D | 2,157 | 1,528 | 5,321 | ||
| R | 2,425 | 2,914 | 5,561 | ||
| R | 1,696 | 3,364 | 5,421 | ||
| R | 2,837 | 3,303 | 6,291 | ||
| D | 3,214 | 2,839 | 6,108 | ||
| R | 2,200 | 2,302 | 5,110 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
33.9%
Irish
13.4%
English
12.1%
American
6.7%
Italian
2.3%
French
1.2%
Scottish
1.1%
Sample size too small to break out by ancestry reliably.
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: 42.1 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
$79,535
Harrison County ranks in the top 25% of US counties.
Harrison County$79,535
Iowa$75,059
United States$80,734
Harrison 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
7.1%
Child poverty is below the national average.
Children under 189.6%
Working age (18–64)6.5%
Seniors (65+)4.6%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
98.6%
speak English only
Spanish1.1%
Other Indo-European0.1%
Asian & Pacific Islander0.1%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 59.8% of residents not counted as adherents by any reporting body.
Harrison County, tucked along the Missouri River in western Iowa, has shifted steadily toward lopsided Republican margins over the past two decades, with its 2024 presidential gap of 41.7 points reflecting a broader rural consolidation pattern across the western tier of the state.
The Republican margin here reached forty-two points in 2024. Between 2020 and 2024 the county moved three points toward the Republican candidate; the 2024 margin was forty-two points.
A population of 14,632, a 95% non-Hispanic-white share, and a median household income of $79,535 describe an agricultural county. The county's voting pattern over the last decade is most similar to that of Griggs County and Walsh 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.
Harrison County, Iowa. Akashic. https://akashic.app/county/19085/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More farm belt counties
Frequently asked questions
How did Harrison County, Iowa vote in 2024?
In 2024, Harrison County, Iowa voted Republican by 41.7 points (R+42), carried by the Republican candidate. Out of 7,959 votes cast, 2,245 went Democratic and 5,566 went Republican.
What is Harrison County, Iowa's political typology?
Akashic places Harrison County, Iowa 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 7 times, Republican 27 times, and other 0 times.
When did Harrison County, Iowa last vote Democratic?
The most recent presidential election in which Harrison County, Iowa voted Democratic was 1964.
How many people live in Harrison County, Iowa?
Harrison County, Iowa has a population of 14,632 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Harrison County, Iowa?
Median household income in Harrison County, Iowa is $79,535 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Harrison County, Iowa?
Akashic tracks 38 presidential elections in Harrison County, Iowa from 1876 to 2024. Of those, 7 went Democratic and 27 went Republican. The county's typology — "Farm Belt" — captures where that record, its demographics, and its recent swing place it among American communities.