Clark County, South Dakota

Major highways

Adjacent counties

Protected areas

Lakes and reservoirs

2020 census

As of the 2020 census, there were 3,837 people, 1,361 households, and 853 families residing in the county.^[27] Of the residents, 27.6% were under the age of 18 and 21.2% were 65 years of age or older; the median age was 39.8 years. For every 100 females there were 105.3 males, and for every 100 females age 18 and over there were 101.4 males.^[27]

The population density was 4.0 inhabitants per square mile (1.5/km²). There were 1,603 housing units, of which 15.1% were vacant; among occupied housing units, 76.6% were owner-occupied and 23.4% were renter-occupied, with a homeowner vacancy rate of 1.1% and a rental vacancy rate of 5.1%.^[27]

The racial makeup of the county was 94.3% White, 0.3% Black or African American, 0.6% American Indian and Alaska Native, 0.2% Asian, 1.7% from some other race, and 2.9% from two or more races. Hispanic or Latino residents of any race comprised 4.4% of the population.^[28]

Of the 1,361 households, 25.3% had children under the age of 18 living with them and 20.0% had a female householder with no spouse or partner present. About 33.9% of all households were made up of individuals and 14.5% had someone living alone who was 65 years of age or older.^[27]

2010 census

As of the 2010 census, there were 3,691 people, 1,445 households, and 929 families residing in the county. The population density was 3.9 inhabitants per square mile (1.5/km²). There were 1,710 housing units at an average density of 1.8 per square mile (0.69/km²). The racial makeup of the county was 98.1% white, 0.2% black or African American, 0.1% Asian, 0.1% American Indian, 0.8% from other races, and 0.8% from two or more races. Those of Hispanic or Latino origin made up 1.7% of the population. In terms of ancestry, 52.0% were German, 29.4% were Norwegian, 9.7% were Irish, 7.8% were English, 5.4% were Swedish, and 3.5% were American.

Of the 1,445 households, 23.0% had children under the age of 18 living with them, 55.8% were married couples living together, 4.8% had a female householder with no husband present, 35.7% were non-families, and 32.5% of all households were made up of individuals. The average household size was 2.22 and the average family size was 2.79. The median age was 45.7 years.

The median income for a household in the county was $43,894 and the median income for a family was $55,575. Males had a median income of $33,606 versus $24,952 for females. The per capita income for the county was $23,909. About 7.5% of families and 13.1% of the population were below the poverty line, including 24.5% of those under age 18 and 12.6% of those age 65 or over.

Cities

• Clark (county seat)
• Willow Lake

Towns

Census-designated place

• Collins Colony
• Crocker
• Fordham Colony
• Hillcrest Colony
• Mayfield Colony
• Silver Lake Colony

Unincorporated communities

• Carpenter
• Elrod

Townships