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Dunn County, North Dakota facts for kids

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Dunn County
Dunn County Courthouse - Manning, North Dakota
Dunn County Courthouse - Manning, North Dakota
Map of North Dakota highlighting Dunn 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 March 9, 1883 (created)
January 18, 1908 (organized)
Seat Manning
Largest city Killdeer
 • Total 2,082 sq mi (5,390 km2)
 • Land 2,008 sq mi (5,200 km2)
 • Water 74 sq mi (190 km2)  3.5%
 • Total 4,095
 • Estimate 
 • Density 1.9669/sq mi (0.75941/km2)
Time zones
(northern portion) UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
(southern portion) UTC−7 (Mountain)
 • Summer (DST) UTC−6 (MDT)

Dunn County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 4,095. Its county seat is Manning.


According to the U.S. Census Bureau, the county has a total area of 2,082 square miles (5,390 km2), of which 2,008 square miles (5,200 km2) is land and 74 square miles (190 km2) (3.5%) is water. It is the fifth-largest county in North Dakota by total area.

Dunn County is somewhat unusual among western North Dakota counties. Like other counties in the region, it has both prairie and badlands areas. Located in the northwest part of the county are the Killdeer Mountains, which are more accurately described as hills. These hills help create a mini-ecosystem on the southern edge of the Little Missouri badlands, which has a greater abundance of aspen forests and wildlife than is typically found in southwestern North Dakota.

The northwest corner of the county, northwest of the Killdeer Mountains, features many square miles of bur oak forest, mainly on the north-facing slopes of the hills. Bur oak and quaking aspen, though native to North Dakota, are sparse in western North Dakota, with Dunn County being a notable exception.

Adjacent counties

Major highways

  • North Dakota 8.svgNorth Dakota Highway 8
  • North Dakota 22.svgNorth Dakota Highway 22
  • North Dakota 200.pngNorth Dakota Highway 200

National protected area


Historical population
Census Pop.
1890 159
1910 5,302
1920 8,828 66.5%
1930 9,566 8.4%
1940 8,376 −12.4%
1950 7,212 −13.9%
1960 6,350 −12.0%
1970 4,895 −22.9%
1980 4,627 −5.5%
1990 4,005 −13.4%
2000 3,600 −10.1%
2010 3,536 −1.8%
2020 4,095 15.8%
2021 (est.) 4,035 14.1%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2020

2010 census

As of the 2010 census, there were 3,536 people, 1,401 households, and 977 families in the county. The population density was 1.8 inhabitants per square mile (0.69/km2). There were 2,132 housing units at an average density of 1.1 per square mile (0.42/km2). The racial makeup of the county was 84.9% white, 12.7% American Indian, 0.3% Asian, 0.2% black or African American, 0.2% from other races, and 1.7% from two or more races. Those of Hispanic or Latino origin made up 1.1% of the population. In terms of ancestry, 57.6% were German, 20.3% were Norwegian, 8.5% were Czech, 6.0% were Russian, 5.7% were Irish, 5.3% were English, and 1.8% were American.

Of the 1,401 households, 28.1% had children under the age of 18 living with them, 57.7% were married couples living together, 6.6% had a female householder with no husband present, 30.3% were non-families, and 26.5% of all households were made up of individuals. The average household size was 2.43 and the average family size was 2.93. The median age was 44.4 years.

The median income for a household in the county was $48,707 and the median income for a family was $65,122. Males had a median income of $37,270 versus $23,599 for females. The per capita income for the county was $24,832. About 6.2% of families and 8.6% of the population were below the poverty line, including 7.5% of those under age 18 and 12.1% of those age 65 or over.

Sites of interest

  • Killdeer Mountains
  • Killdeer Mountain National Battlefield



Census-designated place

Unincorporated communities

See also

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

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