County · North Dakota
Sioux County, North Dakota
Sioux County, North Dakota. Sioux County had 3,667 residents in 2025 by the Census Bureau's estimate, down 5.8% since 2020, while North Dakota grew 2.6%. It holds 6 places (3 cities, villages and boroughs, 1 town or township and 2 census-designated) and 2 census tracts. GEOID 38085.
Residents, July 2025 estimate
3,667
Census Bureau estimate (no margin published)
2020 Census count: 3,898 · ACS 2020-2024: 3,740
Median household income
$42,083
±$7,116 (90% margin)
North Dakota: $76,657
Median home value
$85,400
±$11,826 (90% margin)
North Dakota: $249,900
Median gross rent
$444
±$55 (90% margin)
North Dakota: $954
How many people live in Sioux County, and is it growing?
The 2020 Census counted 3,898 residents in Sioux County. The Census Bureau estimates 3,667 for July 1, 2025, down 5.8% since 2020, while North Dakota grew 2.6%. The 2020-2024 American Community Survey puts the population at 3,740 over 1,094 square miles of land.
| Measure | Sioux County | North Dakota | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,740 | 784,841 | −633 |
| Households | 1,112±29 | 331,063 | no clear change |
| Average household size | 3.29±0.09 | 2.28 | −0.59 |
| Housing units | 1,280±15 | 377,281 | −68 |
Sioux County's population since 2000
From 4,044 in 2000 to 3,667 in 2025: down 9.3%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Sioux County?
Sioux County holds 6 places: 3 cities, villages and boroughs (incorporated places), 1 town or township (a county subdivision with its own government) and 2 census-designated places. The largest is Cannon Ball with 748 residents (2020-2024). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Cannon Ball | 864 | $42,031 |
|---|---|---|
| PorcupineGEOID 3863700 | 197 | $70,469 |
| Fort YatesGEOID 3827860 | 176 | $97,250 |
| SelfridgeGEOID 3871660 | 127 | $56,250 |
| SolenGEOID 3873820 | 70 | $33,750 |
| Menz TownshipGEOID 3808552300 | 20 | $113,750 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Sioux County?
The median resident of Sioux County is 28.2 years old; 34.0% are under 18 and 9.6% are 65 or older. The largest group is non-Hispanic American Indian and Alaska Native residents at 82.4%, then non-Hispanic white residents at 12.1%.
| Measure | Sioux County | North Dakota | Change since 2015-2019 |
|---|---|---|---|
| Median age | 28.2±0.6 | 35.9 | no clear change |
| Under 18 years | 34.0% | 23.5% | – |
| 65 years and over | 9.6% | 16.5% | – |
| Hispanic or Latino (any race) | 1.5%±0.9 pts | 4.7% | −3.1 pts |
| White alone, not Hispanic | 12.1%±0.6 pts | 81.7% | no clear change |
| Black or African American alone, not Hispanic | 0.4%±0.3 pts | 3.3% | – |
| Asian alone, not Hispanic | 0.7%±0.8 pts | 1.6% | – |
| American Indian and Alaska Native alone, not Hispanic | 82.4%±1.5 pts | 4.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.7 pts | 0.1% | – |
| Two or more races, not Hispanic | 2.2%±1.1 pts | 4.0% | – |
| Some other race alone, not Hispanic | 0.8%±0.6 pts | 0.3% | – |
| Born outside the United States | 0.7%±0.9 pts | 4.7% | – |
| Speak a language other than English at home (age 5+) | 7.8%±2.7 pts | 6.7% | – |
| Civilian veterans (age 18+) | 5.2%±1.8 pts | 7.1% | – |
| With a disability | 13.8%±2.4 pts | 12.0% | – |
| No health insurance coverage | 21.1%±5.0 pts | 6.5% | −10.5 pts |
| High school graduate or higher (age 25+) | 87.9%±3.1 pts | 94.0% | – |
| Bachelor's degree or higher (age 25+) | 16.3%±3.1 pts | 32.7% | no clear change |
| Graduate or professional degree (age 25+) | 5.7%±2.5 pts | 9.7% | – |
| Moved from another state in the past year | 0.8%±0.5 pts | 4.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Sioux County earn?
Half of Sioux County's 1,112 households earn less than $42,083 a year (±$7,116), against $76,657 in North Dakota. In 2015-2019 it was $47,922 in 2024 dollars; the margins of error cannot tell the two periods apart. 43.3% of residents live below the poverty line.
| Measure | Sioux County | North Dakota | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $42,083±$7,116 | $76,657 | no clear change |
| Mean household income | $65,479±$9,373 | $101,793 | – |
| Per capita income | $21,541±$2,476 | $43,389 | no clear change |
| People below the poverty line | 43.3%±5.9 pts | 10.8% | no clear change |
| Children under 18 below the poverty line | 57.2%±10.1 pts | 11.1% | no clear change |
| Households receiving SNAP | 36.8%±5.9 pts | 6.6% | – |
| Households with a broadband subscription | 80.6%±5.3 pts | 88.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Sioux County?
Owners occupy 46.6% of Sioux County's occupied homes and renters 53.4%. The median owner-occupied home is valued at $85,400 by its owner (±$11,826). The median renter pays $444 a month including utilities, and 26.7% of renters pay 35% or more of their income on rent.
| Measure | Sioux County | North Dakota | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $85,400±$11,826 | $249,900 | no clear change |
| Median gross rent | $444±$55 | $954 | −$110 |
| Renters paying 35% or more of income on rent | 26.7%±8.9 pts | 31.1% | no clear change |
| Median monthly owner costs, with a mortgage | $950±$568 | $1,762 | – |
| Owner-occupied homes | 46.6%±5.1 pts | 62.9% | no clear change |
| Housing units | 1,280±15 | 377,281 | −68 |
| Homeowner vacancy rate | 0.8%±1.2 pts | 1.2% | – |
| Rental vacancy rate | 2.5%±1.8 pts | 8.3% | – |
| Single-family detached homes | 78.6%±4.0 pts | 56.7% | – |
| Mobile homes | 12.0%±2.7 pts | 6.6% | – |
| Built 2020 or later | 0.6%±0.5 pts | 1.8% | – |
| Built 1939 or earlier | 4.8%±1.8 pts | 11.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Sioux County building?
Builders took permits for 0 new housing units across Sioux County in 2025 (0 single-family), 0.0 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Sioux County get to work?
69.1% of Sioux County's workers drive alone and 7.9% work from home. The average trip to work takes 17.8 minutes. The unemployment rate in 2020-2024 averaged 17.0%.
| Measure | Sioux County | North Dakota | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 52.9%±4.1 pts | 68.6% | – |
| Unemployment rate | 17.0%±4.9 pts | 2.8% | no clear change |
| Drove alone to work | 69.1%±5.0 pts | 77.9% | – |
| Carpooled | 11.9%±4.3 pts | 8.8% | – |
| Public transportation | 1.4%±0.5 pts | 0.3% | – |
| Walked | 9.0%±3.5 pts | 3.2% | – |
| Worked from home | 7.9%±2.5 pts | 8.1% | no clear change |
| Mean travel time to work | 17.8 min±2.3 | 17.9 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Sioux County's census tracts?
Sioux County is divided into 2 census tracts. Among those with a reliable estimate, median household income runs from $34,659 (Tract 9409) to $58,571 (Tract 9408).
| Tract 940838085940800 | 1,489±140 | $58,571 |
|---|---|---|
| Tract 940938085940900 | 2,251±140 | $34,659 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Sioux County compare with North Dakota's other counties?
| Measure | Rank |
|---|---|
| Population | 30th of 53 |
| Growth 2020-2025 | 50th of 53 |
| Residents per square mile | 29th of 53 |
| Median household income | 53rd of 53 |
| Median home value | 52nd of 53 |
| Median gross rent | 52nd of 53 |
| Poverty rate | 1st of 53 |
| Bachelor's degree or higher | 53rd of 53 |
| Median age | 53rd of 53 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Sioux County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.