Marion County, Iowa: Republican loyalist county. In 2024, voted R+38%. Republican peak: R+38 in 2024.
Key facts
- 2024 presidential margin
- R+38MIT Election Lab
- Political archetype
- Republican loyalistAkashic typology
- Population
- 33,6422024 5-year
- Median household income
- $78,6802024 5-year
- White (non-Hispanic)
- 94.4%2024 5-year
- Black
- 0.4%2024 5-year
- Hispanic / Latino
- 2.3%2024 5-year
- Peak Democratic margin
- D+34 in 1964MIT Election Lab
- Peak Republican margin
- R+38 in 2024MIT Election Lab
- Most similar
- Buena Vista County, IA · similarity 0.99
2024 results by precinct
2024 precinct map of Marion CountyPrecinct-level 2024 presidential results for Marion 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.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 5,928 | 13,289 | 19,566 | ||
| R | 6,178 | 12,663 | 19,232 | ||
| R | 5,482 | 10,962 | 17,991 | ||
| R | 7,507 | 9,828 | 17,687 | ||
| R | 7,421 | 9,256 | 17,030 | ||
| R | 6,574 | 9,990 | 16,696 | ||
| R | 5,741 | 8,358 | 14,408 | ||
| R | 5,978 | 6,100 | 13,052 | ||
| R | 5,531 | 6,062 | 13,533 | ||
| D | 6,922 | 5,914 | 12,954 | ||
| R | 6,313 | 7,259 | 13,634 | ||
| R | 5,490 | 6,665 | 13,518 | ||
| D | 6,226 | 5,429 | 11,857 | ||
| R | 4,643 | 6,583 | 11,531 | ||
| R | 4,618 | 5,791 | 11,062 | ||
| D | 7,911 | 3,903 | 11,842 | ||
| R | 4,547 | 7,444 | 12,008 | ||
| R | 5,316 | 6,830 | 12,168 | ||
| R | 5,196 | 7,165 | 12,516 | ||
| D | 6,300 | 4,312 | 10,870 | ||
| D | 6,365 | 4,874 | 11,338 | ||
| D | 6,915 | 5,763 | 12,753 | ||
| D | 6,745 | 4,975 | 11,986 | ||
| D | 7,067 | 3,695 | 11,034 | ||
| R | 4,113 | 6,225 | 10,487 | ||
| R | 2,383 | 5,058 | 10,615 | ||
| R | 3,861 | 5,435 | 9,599 | ||
| D | 3,094 | 2,459 | 5,732 | ||
| D | 2,276 | 1,191 | 5,255 | ||
| D | 2,739 | 2,625 | 5,692 | ||
| R | 2,202 | 2,988 | 5,632 | ||
| O | 2,950 | 2,950 | 6,079 | ||
| D | 3,119 | 2,741 | 5,952 | ||
| D | 2,540 | 2,319 | 5,307 | ||
| — | — | — | — | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
24.0%
English
11.9%
Irish
11.5%
American
4.8%
Italian
2.8%
French
1.4%
Scottish
1.4%
Sample size too small to break out by ancestry reliably.
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.
Age distribution by sex
Median age: 39.9 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.
Median household income
2024 inflation-adjusted dollars
$78,680
Marion County ranks in the top 25% of US counties.
Marion County$78,680
Iowa$75,059
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
8.2%
Child poverty is below the national average.
Children under 186.7%
Working age (18–64)8.9%
Seniors (65+)6.3%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
96.7%
speak English only
Spanish1.5%
Other Indo-European1.1%
Asian & Pacific Islander0.8%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 45.7% of residents not counted as adherents by any reporting body.
Marion County, anchored by Knoxville, sits in south-central Iowa and has shifted steadily rightward over the past two decades, delivering its 2024 presidential margin of R+37.6 — well above the state's already-lopsided statewide result.
The Republican margin in Marion County reached its widest at thirty-eight points in 2024. The margin in 2024 was thirty-eight points, in line with the county's deep historical pattern.
Its loyalty is rooted in its place. Median household income of $78,680, a 94% non-Hispanic-white share, and a population of 33,642 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Buena Vista County and Humboldt County.
Most similar counties
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Marion County, Iowa — The Long Memory. Akashic Intelligence — The Long Memory. https://akashic.app/county/19125/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More republican loyalist counties
Frequently asked questions
How did Marion County, Iowa vote in 2024?
In 2024, Marion County, Iowa voted Republican by 37.6 points (R+38), carried by the Republican candidate. Out of 19,566 votes cast, 5,928 went Democratic and 13,289 went Republican.
What is Marion County, Iowa's political archetype?
Akashic classifies Marion County, Iowa as a "Republican loyalist" county based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the county has voted Democratic 13 times, Republican 20 times, and other 1 times.
When did Marion County, Iowa last vote Democratic?
The most recent presidential election in which Marion County, Iowa voted Democratic was 1988.
How many people live in Marion County, Iowa?
Marion County, Iowa has a population of 33,642 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Marion County, Iowa?
Median household income in Marion County, Iowa is $78,680 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Marion County, Iowa?
Akashic tracks 38 presidential elections in Marion County, Iowa from 1876 to 2024. Of those, 13 went Democratic and 20 went Republican. The county's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.