Douglas County, South Dakota

Major highways

Adjacent counties

Lakes

• Corsica Lake^[8]

2020 census

As of the 2020 census, the county had a population of 2,835, 1,134 households, and 779 families residing in the county.^[14][15]

The population density was 6.6 inhabitants per square mile (2.5/km²).^[14]

Of the residents, 23.1% were under the age of 18 and 26.8% were 65 years of age or older; the median age was 46.6 years. For every 100 females there were 93.3 males, and for every 100 females age 18 and over there were 96.8 males.^[14]

The racial makeup of the county was 94.0% White, 0.2% Black or African American, 1.3% American Indian and Alaska Native, 0.1% Asian, 0.5% from some other race, and 3.8% from two or more races. Hispanic or Latino residents of any race comprised 1.9% of the population.^[15]

There were 1,134 households in the county, of which 26.5% had children under the age of 18 living with them and 17.3% had a female householder with no spouse or partner present. About 27.8% of all households were made up of individuals and 14.8% had someone living alone who was 65 years of age or older.^[14]

There were 1,341 housing units, of which 15.4% were vacant. Among occupied housing units, 79.9% were owner-occupied and 20.1% were renter-occupied. The homeowner vacancy rate was 0.8% and the rental vacancy rate was 19.7%.^[14]

2010 census

As of the 2010 census, there were 3,002 people, 1,210 households, and 819 families in the county. The population density was 7.0 inhabitants per square mile (2.7/km²). There were 1,439 housing units at an average density of 3.3 units per square mile (1.3 units/km²). The racial makeup of the county was 96.6% white, 1.8% American Indian, 0.4% black or African American, 0.1% Asian, 0.3% from other races, and 0.9% from two or more races. Those of Hispanic or Latino origin made up 0.8% of the population. In terms of ancestry, 34.8% were Dutch, 33.9% were German, 5.6% were Norwegian, 5.5% were Irish, 5.4% were Russian, and 5.1% were American.

Of the 1,210 households, 25.5% had children under the age of 18 living with them, 60.8% were married couples living together, 4.2% had a female householder with no husband present, 32.3% were non-families, and 29.1% of all households were made up of individuals. The average household size was 2.33 and the average family size was 2.89. The median age was 48.3 years.

The median income for a household in the county was $42,794 and the median income for a family was $53,750. Males had a median income of $36,689 versus $24,883 for females. The per capita income for the county was $22,200. About 7.2% of families and 9.8% of the population were below the poverty line, including 10.9% of those under age 18 and 15.2% of those age 65 or over.

Cities

• Armour (county seat)
• Corsica
• Delmont

Census-designated places

• Greenwood Colony
• Harrison
• New Holland

Unincorporated community

• Joubert^[16]

Townships

Ghost towns

• Douglas City
• Flensburg
• Grand View
• Huston
• Maitland