Sioux County, North Dakota
| Sioux County, North Dakota | |
|---|---|
 Location in the U.S. state of North Dakota |
|
 North Dakota's location in the U.S. |
|
| Founded | September 12, 1914 |
| Named for | Sioux people |
| Seat | Fort Yates |
| Largest community | Cannon Ball |
| Area | |
| • Total | 1,128 sq mi (2,922 km2) |
| • Land | 1,094 sq mi (2,833 km2) |
| • Water | 34 sq mi (88 km2), 3.0% |
| Population (est.) | |
| • (2015) | 4,370 |
| • Density | 3.8/sq mi (1/km²) |
| Time zones |
Central: UTC-6/-5 (eastern portion) |
|
Mountain: UTC-7/-6 (western portion) |
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Sioux County is a county located along the southern border of the U.S. state of North Dakota. As of the 2010 census, the population was 4,153. Its eastern border is the Missouri River and its county seat is Fort Yates. The county was created by proclamation of Governor Louis B. Hanna on September 3, 1914 and named after the Native American Lakota, whose historic territory included this area and much more. The county government was first organized on September 12, 1914.
The county lies entirely within the Standing Rock Indian Reservation, forming the northernmost 30 percent of the reservation. (The balance of the reservation is in South Dakota). It is the only county in North Dakota that is entirely within an Indian reservation. Sioux County is included in the Bismarck, ND Metropolitan Statistical Area.
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.
As of the census of 2000, there were 4,044 people, 1,095 households, and 871 families residing in the county. The population density was 4 people per square mile (1/km²). There were 1,216 housing units at an average density of 1 per square mile (0/km²). The racial makeup of the county was 84.59% Native American, 14.34% White, 0.02% Black or African American, 0.02% Asian, 0.05% Pacific Islander, 0.07% from other races, and 0.89% from two or more races. 1.61% of the population were Hispanic or Latino of any race. 11.5% were of German ancestry.
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