Sioux County, North Dakota Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 30th-largest in North Dakota
The population of Sioux County, North Dakota is 3,789 as of the 2023 American Community Survey, making it the 30th-largest county in North Dakota. The median household income is $41,676, the median home value is $87,400, and the median age is 28.7.
The population of Sioux County has declined 10.5% since 2010 (4,148 → 3,713), a -0.79% annualized rate.
3,789
Population
-0.79%
Annual growth
3
People / sq mi
$41,676
Median Income
$87,400
Median Home Value
Sioux County covers 1,094 sq mi of land at 3.5 people per square mile.
About Sioux County, ND
Sioux County is a county in North Dakota with a population of 3,789. It ranks #30 among counties in North Dakota by population. The median age is 28.7, younger than the national median. The population is 49.9% male and 50.1% female.
The median household income in Sioux County is $41,676, below the US median of $74,580. 35.0% of residents live below the federal poverty level. Home values sit at a median of $87,400, with monthly rent averaging $466. The homeownership rate of 46.0% is lower than the national rate of 64.8%.
Educational attainment in Sioux County reflects 11.2% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.3% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 18.3 minutes each way.
Sioux County Population History (2010-2024)
The county of Sioux County had a population of 4,148 in 2010 and 3,713 in 2024, a -10.5% growth over 14 years. The peak was 4,467 in 2014. Average annual growth rate: -0.74%.
3,713
Population (2024)
4,148
Population (2010)
4,467
Peak (2014)
-0.74%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 4,148 |
| 2011 | 4,237 |
| 2012 | 4,331 |
| 2013 | 4,442 |
| 2014 | 4,467 |
| 2015 | 4,385 |
| 2016 | 4,455 |
| 2017 | 4,427 |
| 2018 | 4,382 |
| 2019 | 4,259 |
| 2020 | 3,881 |
| 2021 | 3,750 |
| 2022 | 3,697 |
| 2023 | 3,659 |
| 2024 | 3,713 |
Race & Ethnicity
| White | 12.4% |
| Black or African American | 0.2% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 86.5% |
| Two or More Races | 0.0% |
Age & Sex
28.7
Median Age
50.1%
Female
49.9%
Male
9.2%
Age 65+
Age Distribution
Children (under 15): 28.4% · Seniors (65+): 9.2%
Income & Poverty
| Median household income | $41,676$-34,273 vs state |
| Mean household income | $64,425 |
| Per-capita income | $19,102 |
| Poverty rate | 35.0%+28.8% vs state |
| Unemployment rate | 11.0% |
| Employment-to-population | 40.0% |
Top Industries by Employment
The largest employment sector in Sioux County is professional & business services, accounting for 33.5% of workers.
How residents commute
0.6%
Drive alone
5.5%
Carpool
70.2%
Public transit
9.3%
Work from home
18.3 min
Avg commute
Housing
$87,400$-153,700 vs state
Median home value
$466
Median rent
46.0%
Homeownership rate
1,276
Total housing units
83.6%
Occupied
16.4%
Vacant
54.0%
Renter-occupied
Social & access
75.7%
With health insurance
83.3%
With broadband internet
15.8%
Foreign-born
5.0%
Veterans (18+)
15.7%
With a disability
92.7%
Speak language other than English at home
Education
86.9%
High School+
11.2%
Bachelor's+
Largest cities in North Dakota
Other counties in North Dakota
Part of North Dakota
Metro areas in North Dakota
County rankings
Frequently Asked Questions
Sioux County, North Dakota has a population of 3,789 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 30th-largest county in North Dakota. Population density is 3 people per square mile.
The population of Sioux County has declined 10.5% since 2010 (4,148 → 3,713), a -0.79% annualized rate.
The median household income in Sioux County, North Dakota is $41,676, with mean (average) household income of $64,425 and per-capita income of $19,102. 35.0% of residents live below the federal poverty level.
In Sioux County, the largest racial and ethnic groups are Hispanic or Latino (86.5%), White (12.4%), Black or African American (0.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Sioux County, North Dakota is 28.7 years. Residents are 50.1% female and 49.9% male.
The median home value in Sioux County is $87,400 and median monthly rent is $466. 46.0% of occupied housing units are owner-occupied. The county has 1,276 total housing units, 16.4% of which are vacant.
The largest employment sector in Sioux County, North Dakota is professional, scientific, and management services, employing 33.5% of workers. The unemployment rate is 11.0%.
Fargo is among the largest cities associated with Sioux County, North Dakota, with a population of 129,064.
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Statewide data for North Dakota
Population, race, income, age, and trends across North Dakota
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.