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
Age is the most distinctive thing about Sioux County: a median age of 28.7, younger than the national median. Sioux County is a county in North Dakota with a population of 3,789. It ranks #30 among counties in North Dakota by population.
Household earnings sit near the bottom of the range at $41,676, below the US median of $78,538. The poverty rate, 35.0%, is among the steepest of comparable US counties and above the national 12.4%. Home prices sit near the bottom of the range at $87,400, with typical rent around $466.
Four-year-degree attainment is near the bottom of the range for US counties, 11.2%, below the national 35.0%. Remote work is below the national 14.0% at 9.3%, and the average commute runs about 18 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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Full rankings of North Dakota counties
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.