Sioux County, North Dakota: Realigner county. In 2024, voted D+39%. Democratic peak: D+67 in 2008.
Key facts
- 2024 presidential margin
- D+39MIT Election Lab
- Political archetype
- RealignerAkashic typology
- Population
- 3,7402024 5-year
- Median household income
- $42,0832024 5-year
- White (non-Hispanic)
- 12.4%2024 5-year
- Black
- 0.4%2024 5-year
- Hispanic / Latino
- 1.5%2024 5-year
- Peak Democratic margin
- D+67 in 2008MIT Election Lab
- Peak Republican margin
- R+64 in 1920MIT Election Lab
- Most similar
- Menominee County, WI · similarity 0.99
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 |
|---|---|---|---|---|---|
| D | 654 | 285 | 953 | ||
| D | 804 | 258 | 1,186 | ||
| D | 758 | 260 | 1,232 | ||
| D | 900 | 225 | 1,144 | ||
| D | 1,145 | 215 | 1,378 | ||
| D | 804 | 319 | 1,140 | ||
| D | 724 | 269 | 1,041 | ||
| D | 393 | 207 | 690 | ||
| D | 463 | 264 | 984 | ||
| D | 701 | 325 | 1,042 | ||
| D | 655 | 442 | 1,118 | ||
| R | 383 | 620 | 1,090 | ||
| D | 697 | 354 | 1,081 | ||
| R | 557 | 561 | 1,142 | ||
| D | 525 | 482 | 1,065 | ||
| D | 695 | 314 | 1,013 | ||
| D | 688 | 571 | 1,259 | ||
| R | 476 | 718 | 1,197 | ||
| R | 336 | 968 | 1,322 | ||
| R | 465 | 667 | 1,166 | ||
| R | 445 | 673 | 1,122 | ||
| R | 578 | 1,167 | 1,746 | ||
| D | 877 | 585 | 1,664 | ||
| D | 1,328 | 350 | 1,722 | ||
| D | 988 | 687 | 1,698 | ||
| R | 58 | 777 | 1,249 | ||
| R | 163 | 776 | 961 | ||
| R | 200 | 232 | 463 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
9.1%
French
1.3%
Irish
0.9%
English
0.8%
Polish
0.6%
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: 28.2 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
$42,083
Sioux County ranks in the bottom 10% of US counties.
Sioux County$42,083
North Dakota$76,657
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
43.3%
Nearly half of children live in poverty.
Children under 1857.2%
Working age (18–64)36.2%
Seniors (65+)31.3%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
92.2%
speak English only
Other languages6.5%
Asian & Pacific Islander0.7%
Spanish0.4%
Other Indo-European0.2%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 61.3% of residents not counted as adherents by any reporting body.
Sioux County encompasses most of the Standing Rock Sioux Reservation, producing among the widest Democratic presidential margins in the state — 38.7 points in 2024 — driven by a Native American majority electorate.
The unraveling was not abrupt. The Democratic margin in Sioux County peaked at sixty-seven points in 2008; it narrowed steadily over the late twentieth century. The 1984 election delivered the county to the Republican party for the first time in many years, by a margin of nineteen points. By 2024, the margin had settled into deep Republican territory.
The economic and demographic context is severe. The median household income of $42,083 is among the lowest at this geographic scale; 43% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Menominee County and Taos County.
Most similar counties
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Sioux County, North Dakota — The Long Memory. Akashic Intelligence — The Long Memory. https://akashic.app/county/38085/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More in North Dakota
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Frequently asked questions
How did Sioux County, North Dakota vote in 2024?
In 2024, Sioux County, North Dakota voted Democratic by 38.7 points (D+39), carried by the Democratic candidate. Out of 953 votes cast, 654 went Democratic and 285 went Republican.
What is Sioux County, North Dakota's political archetype?
Akashic classifies Sioux County, North Dakota as a "Realigner" county based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the county has voted Democratic 18 times, Republican 10 times, and other 0 times.
When did Sioux County, North Dakota last vote Republican?
The most recent presidential election in which Sioux County, North Dakota voted Republican was 1980.
How many people live in Sioux County, North Dakota?
Sioux County, North Dakota has a population of 3,740 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Sioux County, North Dakota?
Median household income in Sioux County, North Dakota is $42,083 — below the national median of $80,734. The North Dakota state median is $76,657.
What is the political history of Sioux County, North Dakota?
Akashic tracks 38 presidential elections in Sioux County, North Dakota from 1876 to 2024. Of those, 18 went Democratic and 10 went Republican. The county's archetype — "Realigner" — captures the overall trajectory of that voting record.