kids encyclopedia robot

Sioux County, North Dakota facts for kids

Kids Encyclopedia Facts
Quick facts for kids
Sioux County
Postcard. Historic Sioux County Courthouse at Fort Yates, North Dakota.
Postcard. Historic Sioux County Courthouse at Fort Yates, North Dakota.
Map of North Dakota highlighting Sioux County
Location within the U.S. state of North Dakota
Map of the United States highlighting North Dakota
North Dakota's location within the U.S.
Country  United States
State  North Dakota
Founded September 3, 1914 (created)
September 12, 1914 (organized)
Named for Sioux people
Seat Fort Yates
Largest community Cannon Ball
 • Total 1,128 sq mi (2,920 km2)
 • Land 1,094 sq mi (2,830 km2)
 • Water 34 sq mi (90 km2)  3.0%
 • Total 3,898
 • Estimate 
 • Density 3.4557/sq mi (1.3342/km2)
Time zones
(eastern portion) UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
(western portion) UTC−7 (Mountain)
 • Summer (DST) UTC−6 (MDT)

Sioux County is a county located along the southern border of the U.S. state of North Dakota. As of the 2020 census, the population was 3,898. Its eastern border is the Missouri River and its county seat is Fort Yates.


According to the U.S. Census Bureau, the county has a total area of 1,128 square miles (2,920 km2), of which 1,094 square miles (2,830 km2) is land and 34 square miles (88 km2) (3.0%) is water.

Major highways

  • North Dakota 6.svg North Dakota Highway 6
  • North Dakota 24.svg North Dakota Highway 24
  • North Dakota 31.svg North Dakota Highway 31
  • North Dakota 49.svg North Dakota Highway 49

Adjacent counties

National protected area

  • Cedar River National Grassland (part)


Historical population
Census Pop.
1920 3,308
1930 4,687 41.7%
1940 4,419 −5.7%
1950 3,696 −16.4%
1960 3,662 −0.9%
1970 3,632 −0.8%
1980 3,620 −0.3%
1990 3,761 3.9%
2000 4,044 7.5%
2010 4,153 2.7%
2020 3,898 −6.1%
2021 (est.) 3,738 −10.0%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2020

2010 census

As of the 2010 census, there were 4,153 people, 1,158 households, and 900 families in the county. The population density was 3.8 inhabitants per square mile (1.5/km2). There were 1,311 housing units at an average density of 1.2 per square mile (0.46/km2). The racial makeup of the county was 84.1% American Indian, 12.6% white, 0.2% black or African American, 0.1% Asian, 0.1% from other races, and 2.9% from two or more races. Those of Hispanic or Latino origin made up 2.0% of the population. In terms of ancestry, 13.5% were German, and 0.3% were American.

Of the 1,158 households, 54.1% had children under the age of 18 living with them, 32.5% were married couples living together, 31.6% had a female householder with no husband present, 22.3% were non-families, and 17.4% of all households were made up of individuals. The average household size was 3.55 and the average family size was 3.89. The median age was 26.3 years.

The median income for a household in the county was $30,990 and the median income for a family was $31,098. Males had a median income of $31,894 versus $26,619 for females. The per capita income for the county was $13,542. About 39.0% of families and 47.2% of the population were below the poverty line, including 58.4% of those under age 18 and 36.1% of those age 65 or over.




  • Menz

Census-designated places

See also

Kids robot.svg In Spanish: Condado de Sioux (Dakota del Norte) para niños

National Hispanic Heritage Month on Kiddle
Outstanding Hispanic athletes
Mary Joe Fernández
Carlos Bocanegra
Dara Torres
Maya DiRado
kids search engine
Sioux County, North Dakota Facts for Kids. Kiddle Encyclopedia.