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Slope County, North Dakota

US county information
NameSlope County
StateNorth Dakota
Largest cityMarmarth
US Area
Total Area1219 sq mi (3157.2 km2)
Land Area1218 sq mi (3154.6 km2)
Water Area1 sq mi (2.6 km2)
Population727 (2010)
Density0.24/km2 (0.6/sq mi)

     Home | County | Slope County North Dakota

Slope County is a county located in the U.S. state of North Dakota. At the 2010 census, the population was 727, making it the least populous county in North Dakota and the 19th least populous county in the United States. The county seat is Amidon, the second least populous county seat in the country.

Slope County was formed in 1914 following a vote to create a new county out of the southern portion of Billings County. The name refers to the Missouri Slope, a geographical feature that is also a popular designation for western North Dakota, particularly the area west of the Missouri River. The county government was first organized on January 14, 1915; the county seat has always been Amidon.

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