Map of Sioux County, North Dakota

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.

Sioux County overview:
Name:Sioux County
FIPS code:38-085
State:North Dakota
Founded:1915
Named for:Sioux people
Seat:Fort Yates
Total Area:1,128 sq mi (2,920 km²)
Land Area:1,094 sq mi (2,830 km²)
Total Population:3,898
Population Density:3.5/sq mi (1.3/km²)

Sioux County location map. Where is Sioux County?

Sioux County location on the U.S. Map. Where is Sioux County.
Location of Sioux County in the the United States.
Sioux County location on the North Dakota map. Where is Sioux County.
Location of Sioux County in North Dakota.

History

The county was created by proclamation of Governor Louis B. Hanna on September 3, 1914. It was named for the Native American Lakota, whose historic territory included this area. The county government organization was completed on September 12 of that year. 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. From 2013 to 2018, Sioux County was included in the Bismarck, ND Metropolitan Statistical Area.

Sioux County Road Map

Sioux CountyStreet Map.
Street map of Sioux County, North Dakota. Source: OpenStreetMap (OSM)
Sioux CountyMap
Sioux Countypolitical map.

Geography

Sioux County lies on the south line of North Dakota. Its south boundary line abuts the north boundary line of the state of South Dakota. Its north boundary line is formed by the east-northeastward-flowing Cedar Creek, which discharges into the Missouri River at the county’s northeast corner, and its east boundary line is formed by the south-southeast-flowing Missouri River, which also forms Lake Oahe along the county boundary line. Porcupine Creek flows southeastward into the Missouri River, draining the northeastern part of the county. The county terrain consists of low rolling hills etched with gullies and drainages; the area is mostly devoted to agriculture. The terrain slopes to the east and south; its highest point is on the west line, near the southwestern corner of the county, at 2,602′ (793m) ASL. The county has a total area of 1,128 square miles (2,920 km), of which 1,094 square miles (2,830 km) is land and 34 square miles (88 km) (3.0%) is water.

The southwest corner counties of North Dakota (Adams, Billings, Bowman, Golden Valley, Grant, Hettinger, Slope, and Stark) observe Mountain Time. The counties of McKenzie, Dunn, and Sioux are split, observing Mountain Time in their western portions.

Major highways

  • North Dakota Highway 6
  • North Dakota Highway 24
  • North Dakota Highway 31
  • North Dakota Highway 49
  • North Dakota Highway 1806

Adjacent counties

Protected areas

  • Cedar River National Grassland (part)
  • Froelich Dam State Game Management Area

Sioux County Topographic Map

Topographic Map of Sioux County, North Dakota
Sioux County Topo map.

Sioux County Satellite Map

Satellite Map of Sioux County, North Dakota
Sioux County satellite map.

Sioux County Outline Map

Outline Map of Sioux County, North Dakota
Sioux County outline map.

See also

Map of North Dakota State and its subdivision: Map of other states:
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