Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupSioux CountyNorth DakotaUnited States
Rosebud Sioux0.5%——
Turtle Mountain Chippewa0.3%0.6%—
Navajo0.2%——
Oglala Sioux0.2%——
German9.1%34.5%12.5%
Norwegian1.6%20.3%—
French1.3%2.3%1.6%
Irish0.9%7.3%9.4%
English0.8%5.1%9.5%
Polish0.6%1.6%2.2%
Russian0.4%——
American0.2%2.9%5.3%
Mexican0.9%2.8%11.3%
Puerto Rican0.5%0.5%1.8%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Sioux County
North Dakota
United States
Median age
28.2
36.4
39.1
Age 18–24
13.5%
11.1%
9.2%
Age 65 and older
9.5%
16.5%
17.2%
Household economy
Measure
Sioux County
North Dakota
United States
Median household income
$42,083
$76,657
$84,427
Poverty rate
43.3%
10.8%
12.5%
Bachelor's degree or higher (25+)
16.3%
32.9%
35.6%
Languages at home
Measure
Sioux County
North Dakota
United States
Speaks a non-English language at home
7.8%
6.7%
22.3%
Other languages
6.5%
1.2%
0.8%
Religious landscape
Measure
Sioux County
North Dakota
United States
Catholic
17.2%
21.1%
18.6%
Evangelical Protestant
3.3%
10.8%
16.5%
Unclaimed / not counted
61.3%
45.0%
51.5%
Mainline Protestant
11.5%
21.0%
5.2%
Latter-day Saints
5.9%
1.5%
2.0%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Sioux County, North Dakota
Precinct data
Results by precinct
10 precincts · 953 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
Sioux County precinct-level presidential election results for 2024
Precinct -33
240
156
7
403
59.6%
38.7%
D+20.8
Precinct -11
181
94
2
277
65.3%
33.9%
D+31.4
Precinct -22
233
35
5
273
85.3%
12.8%
D+72.5
Sioux 31-01 Voting District01
0
0
0
0
—
—
Even
Sioux 31-02 Voting District02
0
0
0
0
—
—
Even
Sioux 31-03 Voting District03
0
0
0
0
—
—
Even
Sioux 31-04 Voting District04
0
0
0
0
—
—
Even
Sioux 31-05 Voting District05
0
0
0
0
—
—
Even
Sioux 31-06 Voting District06
0
0
0
0
—
—
Even
Sioux 31-07 Voting District07
0
0
0
0
—
—
Even
presidential history
Presidential margin, 1916–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1916
−6.9%
1920
−63.8%
1924
−57.6%
1928
+17.7%
1932
+56.8%
1936
+17.5%
1940
−33.7%
1944
−20.3%
1948
−17.3%
1952
−47.8%
1956
−20.2%
1960
+9.3%
1964
+37.6%
1968
+4.0%
1972
−0.4%
1976
+31.7%
1980
−21.7%
1984
+19.1%
1988
+36.1%
1992
+20.2%
1996
+27.0%
2000
+43.7%
2004
+42.5%
2008
+67.5%
2012
+59.0%
2016
+40.4%
2020
+46.0%
2024
+38.7%
DemocraticRepublican
38 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
68.6%Harris654
29.9%Trump285
1.2%Oliver11 +1
D+38.7
R+7.3
D+40.2
953
All 4 candidates in 2024 · 2 minor / independent
Kamala D HarrisDemocratic68.6%654
Donald J TrumpRepublican29.9%285
Chase OliverLibertarian1.2%11
OtherAll other candidates0.3%3
D
67.8%Biden804
21.8%Trump258
1.0%Jorgensen12
D+46.0
D+5.6
D+41.6
1,186
D
61.5%Clinton758
21.1%Trump260
10.4%Stein128
D+40.4
R+18.6
D+38.3
1,232
D
78.7%Obama900
19.7%Romney225
1.7%
D+59.0
R+8.5
D+55.1
1,144
D
83.1%Obama1,145
15.6%McCain215
1.3%
D+67.5
D+24.9
D+60.2
1,378
D
70.5%Kerry804
28.0%Bush319
1.5%
D+42.5
R+1.2
D+45.0
1,140
D
69.5%Gore724
25.8%Bush269
1.5%Nader16
D+43.7
D+16.8
D+43.2
1,041
D
57.0%Clinton393
30.0%Dole207
11.9%Perot82
D+27.0
D+6.7
D+18.4
690
D
47.1%Clinton463
26.8%Bush264
24.8%Perot244
D+20.2
R+15.9
D+14.7
984
D
67.3%Dukakis701
31.2%Bush325
1.5%
D+36.1
D+17.0
D+43.8
1,042
D
58.6%Mondale655
39.5%Reagan442
1.9%
D+19.1
D+40.8
D+37.3
1,118
R
35.1%Carter383
56.9%Reagan620
8.0%
R+21.7
R+53.5
R+12.0
1,090
D
64.5%Carter697
32.7%Ford354
2.8%
D+31.7
D+32.1
D+29.7
1,081
R
48.8%McGovern557
49.1%Nixon561
2.1%
R+0.4
R+4.4
D+22.8
1,142
D
49.3%Humphrey525
45.3%Nixon482
5.4%
D+4.0
R+33.6
D+4.7
1,065
D
68.6%Johnson695
31.0%Goldwater314
0.4%
D+37.6
D+28.3
D+15.0
1,013
D
54.6%Kennedy688
45.4%Nixon571
0.0%
D+9.3
D+29.5
D+9.1
1,259
R
39.8%Stevenson476
60.0%Eisenhower718
0.3%
R+20.2
D+27.6
R+4.8
1,197
R
25.4%Stevenson336
73.2%Eisenhower968
1.4%
R+47.8
R+30.5
R+37.0
1,322
R
39.9%Truman465
57.2%Dewey667
2.9%
R+17.3
D+3.0
R+21.8
1,166
R
39.7%Roosevelt445
60.0%Dewey673
0.4%
R+20.3
D+13.4
R+27.8
1,122
R
33.1%Roosevelt578
66.8%Willkie1,167
0.1%
R+33.7
R+51.3
R+43.7
1,746
D
52.7%Roosevelt877
35.2%Landon585
12.1%
D+17.5
R+39.2
R+6.7
1,664
D
77.1%Roosevelt1,328
20.3%Hoover350
2.6%
D+56.8
D+39.1
D+39.0
1,722
D
58.2%Smith988
40.5%Hoover687
1.4%
D+17.7
D+75.3
D+35.2
1,698
R
4.6%Davis58
62.2%Coolidge777
32.6%La Follette407
R+57.6
D+6.2
R+32.4
1,249
R
17.0%Cox163
80.7%Harding776
2.3%
R+63.8
R+56.9
R+37.6
961
R
43.2%Wilson200
50.1%Hughes232
6.7%
R+6.9
—
R+10.1
463
—
—
—
—
No data
—
—
—
—
—
—
—
No data
—
—
—
—
—
—
—
No data
—
—
—
—
—
—
—
No data
—
—
—
—
—
—
—
No data
—
—
—
—
—
—
—
No data
—
—
—
—
—
—
—
No data
—
—
—
—
—
—
—
No data
—
—
—
—
—
—
—
No data
—
—
—
—
—
—
—
No data
—
—
—
Congressional elections · 3 Senate races
U.S. Senate
Source · MIT Election Lab (MEDSL), Senate. CC-BY 4.0.
Year
Won
Democratic
Republican
Total
2024
D
70.3%665
29.7%281
946
2022
D
51.6%301
30.2%176
583
2018
D
84.6%1,211
15.4%221
1,432
domestic migration
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−63 net domestic migration · 2025
20112025
Net −555 over 2011–2025 · gain loss
Arrivals reported $21,793 in average income, against $38,708 for residents who stayed — 44% lower. (IRS SOI, 2022–23)
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
Domestic migration in Sioux County, ND in Sioux County, ND: net domestic migration by year
Year
Net domestic migration
2011
+31
2012
+24
2013
+64
2014
−28
2015
−146
2016
+43
2017
−92
2018
−83
2019
−156
2021
−118
2022
−54
2023
−41
2024
+64
2025
−63
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.
Across the recorded series it reached a Democratic high of 67.5 points in 2008 and a Republican high of 63.8 points in 1920. Between 2020 and 2024 the county moved 7.3 points toward the Republican candidate; the 2024 margin was 38.7 points.
A population of 3,740, a 12% non-Hispanic-white share, and a median household income of $42,083 describe the county. The county's voting pattern over the last decade is most similar to that of McKinley County and Roosevelt County.
Akashic
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
In 2024, Sioux County, North Dakota voted Democratic by 38.7 points (D+38.7), carried by the Democratic candidate. Out of 953 votes cast, 654 went Democratic and 285 went Republican.
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.
