Sioux County, Iowa: Republican loyalist county. In 2024, voted R+71%. Republican peak: R+72 in 2004.
Key facts
- 2024 presidential margin
- R+71MIT Election Lab
- Political archetype
- Republican loyalistAkashic typology
- Population
- 36,2122024 5-year
- Median household income
- $86,0982024 5-year
- White (non-Hispanic)
- 85.0%2024 5-year
- Black
- 0.6%2024 5-year
- Hispanic / Latino
- 14.3%2024 5-year
- Peak Democratic margin
- D+22 in 1932MIT Election Lab
- Peak Republican margin
- R+72 in 2004MIT Election Lab
- Most similar
- Buffalo County, NE · similarity 1.00
2024 results by precinct
2024 precinct map of Sioux CountyPrecinct-level 2024 presidential results for Sioux 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 | 2,626 | 16,053 | 19,001 | ||
| R | 3,019 | 15,680 | 19,051 | ||
| R | 2,300 | 14,785 | 18,332 | ||
| R | 2,700 | 14,407 | 17,308 | ||
| R | 3,030 | 13,490 | 16,664 | ||
| R | 2,259 | 14,229 | 16,570 | ||
| R | 2,148 | 12,241 | 14,692 | ||
| R | 2,392 | 10,864 | 14,110 | ||
| R | 2,226 | 10,637 | 14,730 | ||
| R | 2,923 | 10,270 | 13,288 | ||
| R | 2,585 | 11,665 | 14,293 | ||
| R | 2,698 | 10,768 | 14,167 | ||
| R | 3,322 | 9,448 | 12,935 | ||
| R | 2,867 | 10,721 | 13,697 | ||
| R | 2,181 | 10,010 | 12,507 | ||
| R | 4,233 | 8,078 | 12,323 | ||
| R | 2,643 | 10,284 | 12,934 | ||
| R | 2,666 | 9,651 | 12,328 | ||
| R | 2,050 | 10,275 | 12,349 | ||
| R | 4,042 | 5,597 | 9,801 | ||
| R | 3,369 | 6,552 | 9,940 | ||
| R | 4,144 | 7,585 | 11,750 | ||
| D | 5,553 | 4,543 | 10,669 | ||
| D | 6,170 | 3,943 | 10,202 | ||
| R | 2,839 | 6,378 | 9,248 | ||
| R | 900 | 4,960 | 8,420 | ||
| R | 1,510 | 6,068 | 7,653 | ||
| R | 2,049 | 2,261 | 4,357 | ||
| O | 1,453 | 575 | 4,664 | ||
| R | 1,891 | 2,697 | 4,642 | ||
| R | 1,151 | 2,992 | 4,224 | ||
| R | 1,809 | 3,025 | 4,903 | ||
| R | 1,898 | 2,841 | 4,814 | ||
| R | 1,792 | 2,021 | 3,920 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
21.5%
American
6.1%
Irish
4.5%
English
3.5%
French
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.
Age distribution by sex
Median age: 33.8 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
$86,098
Sioux County ranks in the top 25% of US counties.
Sioux County$86,098
Iowa$75,059
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
6.7%
Child poverty is below the national average.
Children under 186.4%
Working age (18–64)6.5%
Seniors (65+)9.5%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
87.5%
speak English only
Spanish11.1%
Other Indo-European0.9%
Asian & Pacific Islander0.4%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 25.5% of residents not counted as adherents by any reporting body.
Sioux County's 2024 presidential margin of R+70.7 ranks among the widest in Iowa, reflecting a densely Reformed Dutch Protestant community in the northwest corner of the state where cultural homogeneity translates into unusually consistent electoral outcomes.
The Republican margin in Sioux County reached its widest at seventy-two points in 2004. The margin in 2024 was seventy-one points, in line with the county's deep historical pattern.
Its loyalty is rooted in its place. Median household income of $86,098, a 85% non-Hispanic-white share, and a population of 36,212 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 Buffalo County and Hansford County.
Most similar counties
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Sioux County, Iowa — The Long Memory. Akashic Intelligence — The Long Memory. https://akashic.app/county/19167/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Frequently asked questions
How did Sioux County, Iowa vote in 2024?
In 2024, Sioux County, Iowa voted Republican by 70.7 points (R+71), carried by the Republican candidate. Out of 19,001 votes cast, 2,626 went Democratic and 16,053 went Republican.
What is Sioux County, Iowa's political archetype?
Akashic classifies Sioux 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 2 times, Republican 31 times, and other 1 times.
When did Sioux County, Iowa last vote Democratic?
The most recent presidential election in which Sioux County, Iowa voted Democratic was 1936.
How many people live in Sioux County, Iowa?
Sioux County, Iowa has a population of 36,212 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Sioux County, Iowa?
Median household income in Sioux County, Iowa is $86,098 — above the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Sioux County, Iowa?
Akashic tracks 38 presidential elections in Sioux County, Iowa from 1876 to 2024. Of those, 2 went Democratic and 31 went Republican. The county's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.