Sioux County, Iowa: Sunbelt Conservative county. In 2024, voted R+71%. Republican peak: R+72 in 2004.
Key facts
- 2024 presidential margin
- R+71MIT Election Lab
- Political typology
- Sunbelt ConservativeAkashic 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.
—
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 | −5.8% |
| 1896 | −19.6% |
| 1900 | −24.8% |
| 1904 | −43.6% |
| 1908 | −17.4% |
| 1912 | +18.8% |
| 1916 | −4.9% |
| 1920 | −59.6% |
| 1924 | −48.2% |
| 1928 | −38.3% |
| 1932 | +21.8% |
| 1936 | +9.5% |
| 1940 | −29.3% |
| 1944 | −32.0% |
| 1948 | −15.9% |
| 1952 | −66.6% |
| 1956 | −56.7% |
| 1960 | −59.1% |
| 1964 | −31.2% |
| 1968 | −62.6% |
| 1972 | −57.3% |
| 1976 | −47.4% |
| 1980 | −57.0% |
| 1984 | −63.5% |
| 1988 | −55.3% |
| 1992 | −57.1% |
| 1996 | −60.0% |
| 2000 | −68.7% |
| 2004 | −72.2% |
| 2008 | −62.8% |
| 2012 | −67.6% |
| 2016 | −68.1% |
| 2020 | −66.5% |
| 2024 | −70.7% |
DemocraticRepublican
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
2024 ACS
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.
2024 ACS
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.
2024 ACS
Median household income
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
Sioux 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
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.
2024 ACS
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.
2020 religion census
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 here reached seventy-two points in 2004. Between 2020 and 2024 the county moved four points toward the Republican candidate; the 2024 margin was seventy-one points.
A median household income of $86,098, a 85% non-Hispanic-white share, and a population of 36,212 describe the county. The county's voting pattern over the last decade is most similar to that of Buffalo County and Hansford 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.
Sioux County, Iowa. Akashic. https://akashic.app/county/19167/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More sunbelt conservative counties
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 typology?
Akashic places Sioux County, Iowa in the "Sunbelt Conservative" typology — Affluent, predominantly white Sunbelt counties — reliably Republican. 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 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 typology — "Sunbelt Conservative" — captures where that record, its demographics, and its recent swing place it among American communities.