Dickinson County, Iowa: Heartland Swing county. In 2024, voted R+40%. Republican peak: R+62 in 1920.
Key facts
- 2024 presidential margin
- R+40MIT Election Lab
- Political typology
- Heartland SwingAkashic typology
- Population
- 17,9902024 5-year
- Median household income
- $75,4322024 5-year
- White (non-Hispanic)
- 94.3%2024 5-year
- Black
- 0.0%2024 5-year
- Hispanic / Latino
- 2.9%2024 5-year
- Peak Democratic margin
- D+19 in 1936MIT Election Lab
- Peak Republican margin
- R+62 in 1920MIT Election Lab
- Most similar
- Giles County, VA · similarity 0.99
2024 results by precinct
2024 precinct map of Dickinson CountyPrecinct-level 2024 presidential results for Dickinson 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 | −27.4% |
| 1896 | −36.6% |
| 1900 | −49.1% |
| 1904 | −59.6% |
| 1908 | −36.4% |
| 1912 | +2.4% |
| 1916 | −16.3% |
| 1920 | −61.9% |
| 1924 | −56.5% |
| 1928 | −41.6% |
| 1932 | +9.1% |
| 1936 | +18.6% |
| 1940 | +4.3% |
| 1944 | +7.3% |
| 1948 | +0.4% |
| 1952 | −42.8% |
| 1956 | −18.6% |
| 1960 | −14.0% |
| 1964 | +17.6% |
| 1968 | −19.3% |
| 1972 | −21.4% |
| 1976 | −10.3% |
| 1980 | −18.9% |
| 1984 | −14.5% |
| 1988 | −4.7% |
| 1992 | −1.1% |
| 1996 | +5.7% |
| 2000 | −7.0% |
| 2004 | −12.5% |
| 2008 | −5.4% |
| 2012 | −17.9% |
| 2016 | −35.4% |
| 2020 | −33.6% |
| 2024 | −39.9% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 3,297 | 7,775 | 11,234 | ||
| R | 3,661 | 7,438 | 11,244 | ||
| R | 3,056 | 6,753 | 10,457 | ||
| R | 4,095 | 5,912 | 10,159 | ||
| R | 4,625 | 5,162 | 9,906 | ||
| R | 4,140 | 5,337 | 9,553 | ||
| R | 3,660 | 4,225 | 8,121 | ||
| D | 3,562 | 3,129 | 7,646 | ||
| R | 3,106 | 3,196 | 8,304 | ||
| R | 3,342 | 3,678 | 7,101 | ||
| R | 3,025 | 4,064 | 7,170 | ||
| R | 2,620 | 4,028 | 7,442 | ||
| R | 3,074 | 3,795 | 7,010 | ||
| R | 2,373 | 3,739 | 6,381 | ||
| R | 2,286 | 3,472 | 6,151 | ||
| D | 3,490 | 2,443 | 5,938 | ||
| R | 2,696 | 3,575 | 6,273 | ||
| R | 2,498 | 3,641 | 6,157 | ||
| R | 1,748 | 4,401 | 6,194 | ||
| D | 2,324 | 2,304 | 4,766 | ||
| D | 2,473 | 2,133 | 4,627 | ||
| D | 2,985 | 2,736 | 5,742 | ||
| D | 3,399 | 2,322 | 5,791 | ||
| D | 2,500 | 2,074 | 4,706 | ||
| R | 1,251 | 3,045 | 4,315 | ||
| R | 435 | 2,967 | 4,483 | ||
| R | 760 | 3,298 | 4,101 | ||
| R | 893 | 1,249 | 2,182 | ||
| O | 502 | 457 | 1,862 | ||
| R | 503 | 1,109 | 1,666 | ||
| R | 312 | 1,320 | 1,692 | ||
| R | 445 | 1,352 | 1,848 | ||
| R | 517 | 1,131 | 1,679 | ||
| R | 443 | 801 | 1,307 | ||
| — | — | — | — | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
41.0%
Irish
11.1%
English
8.3%
American
4.1%
Scottish
1.9%
French
1.8%
Italian
1.2%
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: 48.7 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
$75,432
Dickinson County ranks in the top 25% of US counties.
Dickinson County$75,432
Iowa$75,059
United States$80,734
Dickinson 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
7.6%
Child poverty is below the national average.
Children under 187.9%
Working age (18–64)7.7%
Seniors (65+)6.3%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
98.3%
speak English only
Spanish1.0%
Other Indo-European0.4%
Asian & Pacific Islander0.3%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 32.5% of residents not counted as adherents by any reporting body.
Home to the Iowa Great Lakes recreation corridor, Dickinson County draws seasonal tourism that inflates its summer population well above its 16,000 residents, yet its year-round electorate has delivered Republican presidential margins exceeding 35 points in recent cycles.
The Democratic margin here peaked at nineteen points in 1936. Between 2020 and 2024 the county moved six points toward the Republican candidate; the 2024 margin was forty points.
A population of 17,990, a 94% non-Hispanic-white share, and a median household income of $75,432 describe the county. The county's voting pattern over the last decade is most similar to that of Giles County and Roane 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.
Dickinson County, Iowa. Akashic. https://akashic.app/county/19059/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More heartland swing counties
Frequently asked questions
How did Dickinson County, Iowa vote in 2024?
In 2024, Dickinson County, Iowa voted Republican by 39.9 points (R+40), carried by the Republican candidate. Out of 11,234 votes cast, 3,297 went Democratic and 7,775 went Republican.
What is Dickinson County, Iowa's political typology?
Akashic places Dickinson County, Iowa in the "Heartland Swing" typology — Industrial Midwest swing counties drifting steadily toward the Republican 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 7 times, Republican 26 times, and other 1 times.
When did Dickinson County, Iowa last vote Democratic?
The most recent presidential election in which Dickinson County, Iowa voted Democratic was 1996.
How many people live in Dickinson County, Iowa?
Dickinson County, Iowa has a population of 17,990 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Dickinson County, Iowa?
Median household income in Dickinson County, Iowa is $75,432 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Dickinson County, Iowa?
Akashic tracks 38 presidential elections in Dickinson County, Iowa from 1876 to 2024. Of those, 7 went Democratic and 26 went Republican. The county's typology — "Heartland Swing" — captures where that record, its demographics, and its recent swing place it among American communities.